{"title":"Filter Papers \u0026 Membranes","description":"","products":[{"product_id":"grade-4-qualitative-filter-paper-standard-grade-circle-4-7cm","title":"Whatman™ Grade 4 Qualitative Filter Paper, Standard Whatman™ Grade, circle, 4.7cm","description":"\u003cp\u003eWhatman Grade  4 Qualitative Filter Papers\u003cbr\u003e\r\n\u003cbr\u003e\r\nWhatman Grade 4 Qualitative Filter Papers are standard grade high flow rate cellulose filter papers for fast filtration.\u003cbr\u003e\r\n\u003cbr\u003e\r\nOverview\u003cbr\u003e\r\nWhatman Grade 4 Qualitative Filter Papers are a standard grade, high flow rate filter paper. They are useful in qualitative analytical separations when fast flow is required and the collection of fine particles is not critical.\u003cbr\u003e\r\n\u003cbr\u003e\r\nThese cellulose filters are used in qualitative analytical techniques to determine and identify materials (e.g., in air pollution monitoring).\u003cbr\u003e\r\n\u003cbr\u003e\r\nExtremely high flow rate:\u003cbr\u003e\r\n•Excellent retention: captures coarse particles and gelatinous precipitates such as ferric hydroxide and aluminum hydroxide\u003cbr\u003e\r\n•Fast filtration: useful for routine clean-up of biological fluids or organic extracts during analysis\u003cbr\u003e\r\n\u003cbr\u003e\r\n**IMAGE is a sample only**\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53657892454691,"sku":"WHAT1004-047","price":12.5,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1004.jpg?v=1782860457"},{"product_id":"grade-1-qualitative-filter-paper-standard-grade-circle-4-7cm","title":"Whatman™ Grade 1 Qualitative Filter Paper, Standard Whatman™ Grade, circle, 4.7cm","description":"\u003cp\u003eWhatman™ Grade 1 Qualitative Filter Papers\u003cbr\u003e\r\n\u003cbr\u003e\r\nWhatman Grade 1 Qualitative Filter Papers are the most widely used standard grade medium flow rate cellulose filter papers.\u003cbr\u003e\r\n\u003cbr\u003e\r\nOverview\u003cbr\u003e\r\nWhatman Grade 1 Qualitative Filter Papers are the most widely used filter paper for routine laboratory applications, qualitative analytical separations, and clarifying liquids. They are the standard grade cellulose filter papers for medium flow rates.\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Qualitative analytical separations for precipitates such as lead sulfate, calcium oxalate (hot), and calcium carbonate\u003cbr\u003e\r\n•Agricultural soil analysis and seed testing procedures\u003cbr\u003e\r\n•Industrial food processing techniques to extract liquid or separate solid foodstuffs from associated liquid\u003cbr\u003e\r\n•Air pollution monitoring by collecting atmospheric dust from airflow and photometrically measuring the stain-intensity\u003cbr\u003e\r\n•Gas detection by quantitative chromogenesis with optical reflectance\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53657894748451,"sku":"WHAT1001-047","price":13.9,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1001-047.jpg?v=1783465834"},{"product_id":"whatman-grade-3236-seed-test-paper-grey-pleated-strips-50-double-pleats-110-20-mm","title":"Whatman™ Grade 3236 seed test paper, grey pleated Strips, 50 double pleats 110 × 20mm","description":"\u003cp\u003eWhatman Grade 3236 seed test paper, grey pleated strips, 50 double pleats 110 × 20 mm, 500\/PK\u003cbr\u003e\r\n\u003cbr\u003e\r\nOverview\u003cbr\u003e\r\nGrade 3236 pleated strips for seed testing.\u003cbr\u003e\r\nOwing to their extremely high purity our seed testing papers provide reliable and reproducible results. The papers are made from pure cellulose without any additives and do not contain any substances that could influence the growth of the seeds. The constant water absorption of the papers ensures the continuous provision of the required amount of water.\u003cbr\u003e\r\n\u003cbr\u003e\r\nThe better contrast of the color seed testing papers makes evaluation easier, particularly for seeds with fine white rootlets or under artificial light. This makes work easier, improves the results, and saves time. The dyes that we use have been thoroughly investigated and have no influence on the growth of the seeds.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53657906741539,"sku":"WHAT10345573","price":846.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/10345573.png?v=1781227934"},{"product_id":"grade-226-qualitative-filter-paper-creped-grey-20cm","title":"Whatman™ Grade 226 Qualitative Filter Paper, creped, grey, 20cm","description":"\u003cp\u003eWhatman® filter paper, Grade 226, creped, grey\u003cbr\u003e\r\ncircles, diam. 200 mm (7.9 in.), pkg of 100 ea\u003cbr\u003e\r\n\u003cbr\u003e\r\nGeneral description\u003cbr\u003e\r\nFilter papers are manufactured primarily for non-critical industrial laboratory filtration applications requiring inexpensive filters of consistent performance.\u003cbr\u003e\r\n\u003cbr\u003e\r\nGrade 226 is a unique filter paper with a creped, grey surface providing optical contrast for white or dark filtrates. Retains coarse or gelatinous precipitates. Filtration speed is high. Grade 226 is used extensively in sugar laboratories for routine and\/or repetitive filtration.\u003cbr\u003e\r\n\u003cbr\u003e\r\nNote; These papers should not be used for kjeldahl nitrogen analysis.\u003cbr\u003e\r\n\u003cbr\u003e\r\nFeatures and Benefits\u003cbr\u003e\r\n•High filtration speed\u003cbr\u003e\r\n•Retains coarse or gelatinous particulates\u003cbr\u003e\r\n•Unique crêped gray surface provides optical contrast for white or dark filtrates\u003cbr\u003e\r\n\u003cbr\u003e\r\nLegal Information\u003cbr\u003e\r\nWhatman is a registered trademark of Cytiva\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53657911132451,"sku":"WHAT5226-200","price":41.2,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/5226-200.jpg?v=1787625013"},{"product_id":"grade-gf-f-filter-for-tclp-test-use-4-7cm-circle","title":"Whatman™ Grade GF\/F Filter for TCLP Test Use, 4.7cm circle","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nWhatman Grade GF\/F binder-free borosilicate glass microfiber fiber is commonly used for biomolecule purification techniques such as DNA purification and protein precipitation as well as landfill leachate toxicity testing.\u003cbr\u003e\r\n\u003cbr\u003e\r\nStringent particle retention size for biochemical filtering\u003cbr\u003e\r\nApplications include:\u003cbr\u003e\r\n\u003cbr\u003e\r\n•DNA purification and binding\u003cbr\u003e\r\n•Filtration for protein purification\u003cbr\u003e\r\n•Clarifying difficult biochemical solutions and fluids\u003cbr\u003e\r\n•Landfill leachate toxicity testing\u003cbr\u003e\r\n\u003cbr\u003e\r\nDue to its stringent particle retention size specification and pure borosilicate glass composition, the Whatman Grade GF\/F glass microfiber filter was chosen by the US Environmental Protection Agency (EPA) for use in developing the Toxicity Characteristic Leaching Procedure (TCLP) 1311. It remains a prominent component for measuring landfill leachate composition\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Stringent 0.6-0.8 µm particle retention specification\u003cbr\u003e\r\n•Manufactured from pure borosilicate glass\u003cbr\u003e\r\n\u003cbr\u003e\r\nWhatman Grade GF\/F binder-free glass microfiber filters are available in a wide range of sizes in circles and sheets.\u003cbr\u003e\r\n\u003cbr\u003e\r\nThis pure borosilicate glass fiber filter offers very fine particle retention with high loading capacity and flow rate.\u003cbr\u003e\r\n\u003cbr\u003e\r\nFind the right particle retention rating and thickness for your analysis in the Whatman glass microfiber binder-free range.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660014772515,"sku":"WHAT1825-047","price":147.1,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1825_bdd0cb31-e401-4cd1-abed-a0791a5478c4.jpg?v=1788490215"},{"product_id":"grade-5-qualitative-filter-paper-standard-grade-circle-18-5cm","title":"Whatman™ Grade 5 Qualitative Filter Paper Standard Whatman™ Grade, circle, 18.5cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nA standard grade clarifying filter excellent for cloudy suspensions and for water and soil analysis.\u003cbr\u003e\r\nThese cellulose filters are used in qualitative analytical techniques to determine and identify materials. Prepleated qualitative filters are also available, which give improved flow rate and increased loading capacity compared to equivalent flat filters.\u003cbr\u003e\r\n\u003cbr\u003e\r\nGrade 5: 2.5 µm\u003cbr\u003e\r\nThe maximum degree of fine particle filtration in the qualitative range. Capable of retaining the fine precipitates encountered in chemical analysis. Slow flow rate. Excellent clarifying filter for cloudy suspensions and for water and soil analysis. Also available prepleated as Grade 5V.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660014969123,"sku":"WHAT1005-185","price":55.2,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1005-185.jpg?v=1788490218"},{"product_id":"nuclepore-hydrophilic-membrane-0-2-µm-pore-size-47-mm-circle","title":"Nuclepore Hydrophilic Membrane, 0.2 µm pore size, 47mm circle","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nWhatman™ Nuclepore™ track-etched membrane filters offer a highly defined pore size cutoff in the sub-micron range, enabling particle deformity measurement and capture of extremely small particles. These membranes come in a range of pores sizes and diameters and are also available in sheet format. Whatman™ Nuclepore™ membranes are suitable for a wide range of sample types and applications, including bioassays, microscopy, cytology, parasitology, certain air and oceanography analyses, cell biology, cell culture and chemotaxis, and environment analysis.\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Track-etched for highly defined pore size and high pore density\u003cbr\u003e\r\n•Low protein binding and low extractables, minimizing filtration sample contamination risk\u003cbr\u003e\r\n•High chemical resistance and good thermal stability for a wide range of sample types\u003cbr\u003e\r\n•Low, consistent ash and low tare weights\u003cbr\u003e\r\n•Smooth flat membrane surface for high particle visibility\u003cbr\u003e\r\n\u003cbr\u003e\r\nNuclepore™ track-etched polycarbonate membranes are manufactured from high-quality polycarbonate film and have sharply defined pore sizes, high flow rates, and excellent chemical and thermal resistance. The membranes have a smooth flat surface and exhibit very low levels of extractables. The thin and uniform cylindrical pores also facilitate rapid cell migration.\u003cbr\u003e\r\n\u003cbr\u003e\r\nThe hydrophilic membrane filters are manufactured from high-quality polycarbonate film track-etched membrane for high nominal pore size precision and are treated with polyvinylpyrrolidone (PVP).\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660015034659,"sku":"WHAT10417012","price":286.2,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/10417004.jpg?v=1785203415"},{"product_id":"grade-5-qualitative-filter-paper-standard-grade-circle-4-9cm","title":"Whatman™ Grade 5 Qualitative Filter Paper Standard Whatman™ Grade, circle, 9cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nCytiva''s Whatman Grade 540 is a high-purity, acid-treated cellulose lab filter paper. Mechanically strong Grade 540 is well suited for quantitative or gravimetric analysis of strongly acidic or alkaline samples.\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Acid-treated for high wet-strength\u003cbr\u003e\r\n•Extremely low ash content (0.006% ash maximum)\u003cbr\u003e\r\n•Nominal particle retention of 8 µm\u003cbr\u003e\r\n•Medium flow rate (Herzberg filtration speed 200 s)\u003cbr\u003e\r\n•High chemical resistance to strong acid and alkali suspensions\u003cbr\u003e\r\n\u003cbr\u003e\r\nCytiva''s business offers hardened ashless filter paper for a variety of precipitate sizes. Along with general filtration Grade 540, the range includes Grade 542 for retention of fine precipitates and Grade 541 for fast filtration. All three grades are designed for use in gravimetric analysis.\u003cbr\u003e\r\n\u003cbr\u003e\r\nGravimetric analysis of acid and alkali suspensions\u003cbr\u003e\r\nCytiva''s hardened, ashless Grade 540 lab filter paper is frequently used as a gravimetric filter during analysis of metals in acidic or alkaline solutions and in the collection of hydroxides. The acid-treated surface prevents tearing during filtration and allows the user to scrape precipitates from the paper.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660015067427,"sku":"WHAT1454-090","price":38.8,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1540-150.jpg?v=1785203418"},{"product_id":"grade-gf-b-filter-for-liquid-scintillation-2-5cm-circle","title":"Whatman™ Grade GF\/B Filter for Liquid Scintillation, 2.5cm circle","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nA standard grade filter for boiler water analysis.\u003cbr\u003e\r\nThese cellulose filters are used in qualitative analytical techniques to determine and identify materials. Prepleated qualitative filters are also available, which give improved flow rate and increased loading capacity compared to equivalent flat filters.\u003cbr\u003e\r\n\u003cbr\u003e\r\nTwice as fast as Grade 5 with similar fine particle retention. Often specified for boiler water analysis applications.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660015100195,"sku":"WHAT1821-025","price":42.1,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1821.jpg?v=1788490221"},{"product_id":"grade-40-ashless-filter-paper-for-pollution-analysis-11cm","title":"Whatman™ Grade 40 Ashless Filter Paper for Pollution Analysis, 11cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nWhatman™ Grade 40 high-purity filters from Cytiva are general-purpose papers for quantitative analysis. Grade 40 filters are suitable for a variety of analytical filtration applications.\u003cbr\u003e\r\n\u003cbr\u003e\r\n•High-purity filters contain 0.007% maximum ash content\u003cbr\u003e\r\n•Medium nominal particle retention rating of 8 µm\u003cbr\u003e\r\n•Medium filtration speed (Herzberg 340 s)\u003cbr\u003e\r\n•Particularly useful for gravimetric analysis\u003cbr\u003e\r\n\u003cbr\u003e\r\nApplications for high-purity Grade 40 filters\u003cbr\u003e\r\nHigh-purity filters support accurate analysis in applications sensitive to very low levels of background contamination and in gravimetric analysis where ash content might affect weight measurements of combusted samples. Cytiva''s high-purity Whatman™ Grade 40 ashless paper is suited to:\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Soil analysis, when separating solid matter from aqueous extracts\u003cbr\u003e\r\n•Quantitative determination of milk sediment\u003cbr\u003e\r\n•Use as a clean-up filter for solutions prior to atomic absorption (AA) spectrometry\u003cbr\u003e\r\n•Analysis of constituent components in cements, clays, iron, and steel products\u003cbr\u003e\r\n•Collection of trace elements and radionuclides from the atmosphere\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660015362339,"sku":"WHAT1440-110","price":39.4,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1440-110_b2750aff-5c71-4df9-93aa-a0a845726b5d.jpg?v=1788490223"},{"product_id":"grade-541-ashless-fast-filter-paper-15cm","title":"Whatman™ Grade 541 Ashless Fast Filter Paper 15cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nCytiva''s Whatman Grade 541 acid hardened cellulose filter paper features high wet-strength, high chemical resistance, and a large nominal particle retention for fast analytical filtration.\u003cbr\u003e\r\n\u003cbr\u003e\r\n•High wet-strength\u003cbr\u003e\r\n•High chemical resistance to strong acid and alkali suspensions\u003cbr\u003e\r\n•Retention of gelatinous precipitate\u003cbr\u003e\r\n•22 µm nominal particle retention rating\u003cbr\u003e\r\n•Fast flow rate (Herzberg filtration speed 34 s)\u003cbr\u003e\r\n•Maximum of 0.006% ash concentration\u003cbr\u003e\r\n\u003cbr\u003e\r\nAlong with fast Grade 541 filter paper, the hardened, ashless range from Cytiva''s business includes general-purpose Grade 540 and Grade 542 for fine particle retention. All three paper grades are appropriate for use in gravimetric analysis with strong acids and alkali samples.\u003cbr\u003e\r\n\u003cbr\u003e\r\nGelatinous precipitate retention\u003cbr\u003e\r\nHardened ashless filter paper is recommended when fast filtration of a gelatinous precipitate for gravimetric analysis is performed on a strongly acidic or alkali solution. Applications of Grade 541 papers include:\u003cbr\u003e\r\n\u003cbr\u003e\r\nUse as an animal foodstuff filter for determining fiber content\u003cbr\u003e\r\nDetermination of gelatin content in milk and cream\u003cbr\u003e\r\nQuantification of chloride in cement, as well as chloride and phosphorous in coal and coke\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660015395107,"sku":"WHAT1541-150","price":101.2,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1541-xxx.jpg?v=1785203421"},{"product_id":"whatman-1ps-phase-separator-papers-27cm","title":"Whatman™ 1PS Phase Separator Papers 27cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nWhatman 1PS Phase Separator from Cytiva''s business is a hydrophobic filter for routine solvent extraction. Within seconds it retains aqueous phases, while solvent phases flow through.\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Impregnated with stabilized silicone to create a hydrophobic filter\u003cbr\u003e\r\n•Multiple separations can be processed in parallel\u003cbr\u003e\r\n•No special training required\u003cbr\u003e\r\n•Can replace a separatory funnel in certain applications\u003cbr\u003e\r\n\u003cbr\u003e\r\nHydrophobic solvent extraction paper\u003cbr\u003e\r\nSolvent extraction can be time-consuming and messy when numerous separations are required. Cytiva''s Whatman 1PS Phase Separator is impregnated with stabilized silicone, creating a hydrophobic filter paper that can replace separatory funnel use in certain applications.\u003cbr\u003e\r\n\u003cbr\u003e\r\nRapid solvent extraction\u003cbr\u003e\r\nMixed phases are poured directly into the Whatman 1PS Phase Separator filter. The solvent phase flows through the paper quickly and cleanly, automatically stopping after the process is complete; all of the aqueous phase is retained. Droplets are automatically separated within seconds.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660015427875,"sku":"WHAT2200-270","price":393.8,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/2200-090.jpg?v=1785203423"},{"product_id":"cyclopore-polycarbonate-membrane-2-0-µm-pore-size-25-mm-circle","title":"Cyclopore Polycarbonate Membrane, 2.0 µm pore size, 25mm circle","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nCytiva's Whatman™ Cyclopore™ polycarbonate membranes are true pore size microporous membranes featuring the sharp cut-off and reproducible microfiltration characteristics of track-etched membranes.\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Low affinity for stains improves visibility under a microscope\u003cbr\u003e\r\n•Low nonspecific protein binding minimizes sample loss of proteinaceous samples\u003cbr\u003e\r\n•Narrow micropore size distribution and high pore density support rapid surface capture of analyte\u003cbr\u003e\r\n•Negligible absorption and adsorption of filtrate; nonhygroscopic\u003cbr\u003e\r\n•No particle shedding enables clean filtrate\u003cbr\u003e\r\n•Biologically inert\u003cbr\u003e\r\n\u003cbr\u003e\r\nWhatman™ Cyclopore™ track-etched membrane filter circles are suitable for a wide variety of applications, from general filtration, including cross-flow filtration (tangential flow filtration), to air and water monitoring, microorganism analysis, and many healthcare applications, including immunodiagnostics.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660015493411,"sku":"WHAT7060-2511","price":177.73,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/7060-2511.jpg?v=1784614818"},{"product_id":"grade-43-ashless-filter-paper-for-inorganic-analysis-90-mm-circle","title":"Whatman™ Grade 43 Ashless Filter Paper for Inorganic Analysis, 90mm circle","description":"\u003cp\u003eCytiva's Whatman Grade 43 filters support inorganic analysis and other forms of instrumental analyses. The low ash content also makes Grade 43 appropriate for gravimetric analyses requiring sample combustion.\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Very low ash content (0.007% ash concentration maximum)\u003cbr\u003e\r\n•Intermediate particle retention rating of 16 µm\u003cbr\u003e\r\n•Herzberg filtration speed of 155 s\u003cbr\u003e\r\n•Particle collection between that of Grades 40 and 41\u003cbr\u003e\r\n•Cytiva offers other ashless grades to ensure that you have the appropriate particle retention rating for your needs. •Hardened ashless grades are also available for analyses that use strong acid\/alkali solutions.\u003cbr\u003e\r\n\u003cbr\u003e\r\nParticle collection and inorganic analysis\u003cbr\u003e\r\nWhatman Grade 43 from Cytiva's business can be ashed during gravimetric analysis without contributing substantially to the measured weight. These filters are also appropriate for:\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Inorganic analysis in the construction, mining, and steel industries\u003cbr\u003e\r\n•Particle collection for air pollution monitoring for subsequent analysis by X-Ray fluorescence (XRF) techniques\u003cbr\u003e\r\n•Soil analysis\u003cbr\u003e\r\n•Foodstuffs filtration analysis\u003cbr\u003e\r\n\u003cbr\u003e\r\nLooking for a filter paper, membrane filter, or syringe filter? Let Cytiva help you find the optimal filter for your needs to ensure reliable analysis.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660015591715,"sku":"WHAT1443-090","price":39.5,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1443-090.jpg?v=1784182834"},{"product_id":"grade-541-ashless-fast-filter-paper-12-5cm","title":"Whatman™ Grade 541 Ashless Fast Filter Paper 12.5cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nCytiva''s Whatman Grade 541 acid hardened cellulose filter paper features high wet-strength, high chemical resistance, and a large nominal particle retention for fast analytical filtration.\u003cbr\u003e\r\n\u003cbr\u003e\r\n•High wet-strength\u003cbr\u003e\r\n•High chemical resistance to strong acid and alkali suspensions\u003cbr\u003e\r\n•Retention of gelatinous precipitate\u003cbr\u003e\r\n•22 µm nominal particle retention rating\u003cbr\u003e\r\n•Fast flow rate (Herzberg filtration speed 34 s)\u003cbr\u003e\r\n•Maximum of 0.006% ash concentration\u003cbr\u003e\r\n\u003cbr\u003e\r\nAlong with fast Grade 541 filter paper, the hardened, ashless range from Cytiva''s business includes general-purpose Grade 540 and Grade 542 for fine particle retention. All three paper grades are appropriate for use in gravimetric analysis with strong acids and alkali samples.\u003cbr\u003e\r\n\u003cbr\u003e\r\nGelatinous precipitate retention\u003cbr\u003e\r\nHardened ashless filter paper is recommended when fast filtration of a gelatinous precipitate for gravimetric analysis is performed on a strongly acidic or alkali solution. Applications of Grade 541 papers include:\u003cbr\u003e\r\n\u003cbr\u003e\r\nUse as an animal foodstuff filter for determining fiber content\u003cbr\u003e\r\nDetermination of gelatin content in milk and cream\u003cbr\u003e\r\nQuantification of chloride in cement, as well as chloride and phosphorous in coal and coke\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660015624483,"sku":"WHAT1541-125","price":71.4,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1541-xxx_f0101ae4-ba53-40e4-94fe-04d4bf7bee98.jpg?v=1785203430"},{"product_id":"supor-200-0-2um-grid-47mm-sterilized-by-gamma-irradiation","title":"Supor 200 0.2um Grid 47mm. Sterilized by gamma irradiation","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nSupor™ PES membrane disc filters, a Pall Life Sciences product, are high flow rate membranes optimized for biological, pharmaceutical, and sterilizing filtration requirements.\u003cbr\u003e\r\n\u003cbr\u003e\r\n•High flow rate membrane optimized for biological, pharmaceutical, and sterilizing filtration requirements\u003cbr\u003e\r\n•Fast filtration with superior flow rates and high throughputs\u003cbr\u003e\r\n•Low protein binding and extensive drug compatibility for critical applications\u003cbr\u003e\r\n•Saves time and money with fewer filter changes per sample volume\u003cbr\u003e\r\n•142 and 293 mm discs feature printed tab for instant recognition of pore size and lot number\u003cbr\u003e\r\n\u003cbr\u003e\r\nApplications\u003cbr\u003e\r\n•Suited for biological, pharmaceutical, and sterilizing filtration requirements\u003cbr\u003e\r\n•Available for microbiological analysis in individual packaging\u003c\/p\u003e","brand":"Pall","offers":[{"title":"Default Title","offer_id":53660015690019,"sku":"PALL66234","price":388.5,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/66234_8697ff57-7592-46a9-8f5d-b753dac12e35.png?v=1788735915"},{"product_id":"whatman-grade-934-ah-filter-for-total-suspended-solids-analysis-32-mm-circle","title":"Whatman™ Grade 934-AH Filter for Total Suspended Solids Analysis, 32mm circle","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nWhatman Grade 934-AH borosilicate glass microfiber filters feature a smooth surface with high retention efficiency and high flow rates for large-volume liquid filtration.\u003cbr\u003e\r\n\u003cbr\u003e\r\nHigh loading capacity enables efficient filtration of suspended solids:\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Smooth surface: provides efficient precipitate recovery\u003cbr\u003e\r\n•High loading capacity: enables processing of turbid solutions\u003cbr\u003e\r\n•High-grade borosilicate glass microfiber: withstands temperatures up to 550°C\u003cbr\u003e\r\n•Nominal particle retention of 1.5 µm\u003cbr\u003e\r\n•Low fiber shedding\u003cbr\u003e\r\n\u003cbr\u003e\r\nReady-to-use (RTU) formats available for Total Suspended Solid (TSS), Total Dissolved Solids (TDS) and Total Suspended Volatiles (VSS).\u003cbr\u003e\r\n\u003cbr\u003e\r\nWhatman Grade 934-AH filters are well suited for large-volume filtration. Applications include cell harvesting, liquid scintillation counting, air pollution monitoring, and water pollution monitoring.\u003cbr\u003e\r\n\u003cbr\u003e\r\nWhatman Grade 934-AH binder-free glass microfiber filters are available in a wide range of sizes in circles and sheets.\u003cbr\u003e\r\n\u003cbr\u003e\r\nDiscover other binder-free Whatman glass microfiber filters. Options are available with different wet strengths, loading capacities, filtration speeds, and particle retentions.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660015755555,"sku":"WHAT1827-032","price":55.2,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1827-xxx.jpg?v=1785203433"},{"product_id":"omega™-membrane-discs-30k-76-mm","title":"Omega™ membrane discs - 30K - 76mm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nOmega™ ultrafiltration membrane disc filters, a Pall Life Sciences product, provides higher flow rates and lower protein binding than regenerated cellulose.  They offer high performance and stability for users of conventional, non-disposable ultrafiltration stirred cells.\u003cbr\u003e\r\n\u003cbr\u003e\r\nPolyethersulfone membrane provides higher flow rates and lower protein binding than competitive regenerated cellulose. This results in lower processing times and the highest possible recoveries.\u003cbr\u003e\r\nDiscs can be washed and reused.\u003cbr\u003e\r\n\u003cbr\u003e\r\nSanitization\u003cbr\u003e\r\nProvided non-sterile. May be sanitized using 200 ppm sodium hypochloride.\u003cbr\u003e\r\n\u003cbr\u003e\r\nApplications\u003cbr\u003e\r\nReplacement membranes for other stirred cell systems\u003cbr\u003e\r\nConcentration, fractionation, purification, buffer exchange, or desalting of protein, cell broths, and other biomolecules.\u003c\/p\u003e","brand":"Pall","offers":[{"title":"Default Title","offer_id":53660015853859,"sku":"PALLOM030076","price":483.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/OM030076_665df628-5d6f-4c74-aa9d-4ccf048b479b.png?v=1788735918"},{"product_id":"grade-2-qualitative-filter-paper-standard-grade-circle-18-5cm","title":"Whatman™ Grade 2 Qualitative Filter Paper Standard Whatman™ Grade, circle, 18.5cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nWhatman™ Grade 2 qualitative filter papers have a particle retention of 8 µm, slightly more retentive than Grade 1, and with an equivalent increase in filtration time. The filters are tested according to the procedure detailed in ASTM E 2187-09, Sections 9.3.1 and 9.3.2. The paper meets both the conditioned (26.1 ± 0.5 g, SD \u0026lt; 0.3 g) and dried (24.7 ± 0.5 g, SD \u0026lt; 0.3 g) weight requirements.\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Each lot is guaranteed to meet the ASTM E 2187-09 specifications\u003cbr\u003e\r\n•Simplifies testing process by removing lot suitability testing\u003cbr\u003e\r\n•Just condition and use\u003cbr\u003e\r\n\u003cbr\u003e\r\nThese cellulose filters are used in qualitative analytical techniques to determine and identify materials. Prepleated qualitative filters are also available, which give improved flow rate and increased loading capacity compared to equivalent flat filters.\u003cbr\u003e\r\n\u003cbr\u003e\r\nGrade 2: 8 µm\u003cbr\u003e\r\nIn addition to general filtration in the 8 µm particle size range, the extra absorbency is beneficial to applications such as holding soil nutrient in plant growth trials and for monitoring specific contaminants in the atmosphere and in soil testing. Also available prepleated as Grade 2V.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660015919395,"sku":"WHAT1002-185","price":38.1,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1002_6c16b9ec-b179-4674-a482-a3b9695c9eef.jpg?v=1788490226"},{"product_id":"grade-gf-c-glass-microfiber-filter-5-5cm-circle","title":"Whatman™ Grade GF\/C Glass Microfiber Filter, 5.5cm circle","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nCytiva''s Whatman™ filter paper Grade GF\/C glass filters offer a good flow rate and loading capacity that support total suspended solids analysis.\u003cbr\u003e\r\n\u003cbr\u003e\r\nFilter Paper for Total Suspended Solids:\u003cbr\u003e\r\nWhatman binder free glass microfiber filter grade GF\/C from Cytiva is widely used as a total suspended solids filter for applications testing both potable water and waste water.\u003cbr\u003e\r\n\u003cbr\u003e\r\nBrowse below to find your binder-free Whatman glass filters and the right filter paper to match your laboratory and filtration research needs, or learn more about our ready-to-use GF\/C RTU that is pre-washed and dried but not weighed. The GF\/C RTU line pre-treats our traditional GF\/C filter with washing, drying, cooling (in a desiccator), and weighing steps aligned to the requirements of EN 872 – the European norm for suspended solids in water testing.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660015952163,"sku":"WHAT1822-055","price":74.2,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1822-xxx.jpg?v=1786408215"},{"product_id":"grade-5-qualitative-filter-paper-standard-grade-circle-4-5-5cm","title":"Whatman™ Grade 5 Qualitative Filter Paper Standard Whatman™ Grade, circle, 5.5cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nCytiva''s Whatman Grade 540 is a high-purity, acid-treated cellulose lab filter paper. Mechanically strong Grade 540 is well suited for quantitative or gravimetric analysis of strongly acidic or alkaline samples.\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Acid-treated for high wet-strength\u003cbr\u003e\r\n•Extremely low ash content (0.006% ash maximum)\u003cbr\u003e\r\n•Nominal particle retention of 8 µm\u003cbr\u003e\r\n•Medium flow rate (Herzberg filtration speed 200 s)\u003cbr\u003e\r\n•High chemical resistance to strong acid and alkali suspensions\u003cbr\u003e\r\n\u003cbr\u003e\r\nCytiva''s business offers hardened ashless filter paper for a variety of precipitate sizes. Along with general filtration Grade 540, the range includes Grade 542 for retention of fine precipitates and Grade 541 for fast filtration. All three grades are designed for use in gravimetric analysis.\u003cbr\u003e\r\n\u003cbr\u003e\r\nGravimetric analysis of acid and alkali suspensions\u003cbr\u003e\r\nCytiva''s hardened, ashless Grade 540 lab filter paper is frequently used as a gravimetric filter during analysis of metals in acidic or alkaline solutions and in the collection of hydroxides. The acid-treated surface prevents tearing during filtration and allows the user to scrape precipitates from the paper.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660016017699,"sku":"WHAT1454-055","price":24.6,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1540-150_1ca46425-5d6a-4368-b482-eb6207bcaca7.jpg?v=1785203438"},{"product_id":"grade-gf-c-glass-microfiber-filter-15cm-circle","title":"Whatman™ Grade GF\/C Glass Microfiber Filter, 15cm circle","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nCytiva''s Whatman™ filter paper Grade GF\/C glass filters offer a good flow rate and loading capacity that support total suspended solids analysis.\u003cbr\u003e\r\n\u003cbr\u003e\r\nFilter Paper for Total Suspended Solids:\u003cbr\u003e\r\nWhatman binder free glass microfiber filter grade GF\/C from Cytiva is widely used as a total suspended solids filter for applications testing both potable water and waste water.\u003cbr\u003e\r\n\u003cbr\u003e\r\nBrowse below to find your binder-free Whatman glass filters and the right filter paper to match your laboratory and filtration research needs, or learn more about our ready-to-use GF\/C RTU that is pre-washed and dried but not weighed. The GF\/C RTU line pre-treats our traditional GF\/C filter with washing, drying, cooling (in a desiccator), and weighing steps aligned to the requirements of EN 872 – the European norm for suspended solids in water testing.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660017459491,"sku":"WHAT1822-150","price":255.5,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1822.150.jpg?v=1788490229"},{"product_id":"grade-gf-b-filter-for-liquid-scintillation-4-7cm-circle","title":"Whatman™ Grade GF\/B Filter for Liquid Scintillation, 4.7cm circle","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nCytiva''s Whatman brand Grade GF\/B is a thick filter with fine particle filter and good loading capacity. GF\/B filters are particularly useful for liquid clarification and liquid scintillation counting.\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Nominal particle retention of 1.0 µm\u003cbr\u003e\r\n•Appropriate for liquid clarification and\/or liquid scintillation\u003cbr\u003e\r\n\u003cbr\u003e\r\nCytiva offers a wide range of glass microfiber filters to support your analyses. See the Whatman range of glass, binder-free filters to find the thickness and particle retention for your application.\u003cbr\u003e\r\n\u003cbr\u003e\r\nGF\/B fine particle filter benefits\u003cbr\u003e\r\nLiquid scintillation counting requires a fine particle filter, preferably with a high loading capacity. Grade GF\/B filters from Cytiva''s business are ideal for this and similar applications such as waste characterization and liquid clarification for suspended solids analysis.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660017623331,"sku":"WHAT1821-047","price":75.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1821-xxx.jpg?v=1785203443"},{"product_id":"whatman-grade-934-ah-glass-microfiber-filters-11cm","title":"Whatman™ Grade 934-AH Glass Microfiber Filters 11cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nWhatman Grade 934-AH borosilicate glass microfiber filters feature a smooth surface with high retention efficiency and high flow rates for large-volume liquid filtration.\u003cbr\u003e\r\n\u003cbr\u003e\r\nHigh loading capacity enables efficient filtration of suspended solids:\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Smooth surface: provides efficient precipitate recovery\u003cbr\u003e\r\n•High loading capacity: enables processing of turbid solutions\u003cbr\u003e\r\n•High-grade borosilicate glass microfiber: withstands temperatures up to 550°C\u003cbr\u003e\r\n•Nominal particle retention of 1.5 µm\u003cbr\u003e\r\n•Low fiber shedding\u003cbr\u003e\r\n\u003cbr\u003e\r\nReady-to-use (RTU) formats available for Total Suspended Solid (TSS), Total Dissolved Solids (TDS) and Total Suspended Volatiles (VSS).\u003cbr\u003e\r\n\u003cbr\u003e\r\nWhatman Grade 934-AH filters are well suited for large-volume filtration. Applications include cell harvesting, liquid scintillation counting, air pollution monitoring, and water pollution monitoring.\u003cbr\u003e\r\n\u003cbr\u003e\r\nWhatman Grade 934-AH binder-free glass microfiber filters are available in a wide range of sizes in circles and sheets.\u003cbr\u003e\r\n\u003cbr\u003e\r\nDiscover other binder-free Whatman glass microfiber filters. Options are available with different wet strengths, loading capacities, filtration speeds, and particle retentions.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660017656099,"sku":"WHAT1827-110","price":220.5,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1827-xxx_aebefc19-0384-4018-bc2c-df4b25680941.jpg?v=1785203445"},{"product_id":"grade-gf-6-filter-for-water-and-wastewater-analysis-55-mm-circle","title":"Whatman™ Grade GF 6 Filter for Water and Wastewater Analysis, 55mm circle","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nWhatman Grade GF 6 glass microfiber filters from Cytiva's business are suitable for water and wastewater analysis, with extremely fine particle retention and added strength.\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Sub micron filter retention efficiency to capture extremely small particles\u003cbr\u003e\r\n•Inorganic binder for increased strength\u003cbr\u003e\r\n•Temperature-resistant up to 500°C\u003cbr\u003e\r\n•Can be used as a pre-filter for dense samples\u003cbr\u003e\r\n•Frequently used in waste water analysis\u003cbr\u003e\r\n\u003cbr\u003e\r\nCytiva offers a range of glass filters with both organic and inorganic binders.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660017688867,"sku":"WHAT10370003","price":156.6,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/10370003.jpg?v=1788791738"},{"product_id":"grade-gf-a-glass-microfiber-filters-binder-free-2-5cm","title":"Whatman™ Grade GF\/A Glass Microfiber Filters, Binder Free 2.5cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nWhatman™ Grade GF\/A glass microfiber filters, binder free, feature fine particle retention for a range of liquid and air filtration applications. These have a nominal particle retention of 1.6µm at 98% efficiency and are suited for a variety of applications involving large sample volumes such as:\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Water and air pollution monitoring and wastewater filtering\u003cbr\u003e\r\n•Foodstuff analysis\u003cbr\u003e\r\n•Filtering of algae and bacteria cultures\u003cbr\u003e\r\n•Protein filtration\u003cbr\u003e\r\n•Radioimmunoassay of weak ß emitters\u003cbr\u003e\r\n•Gravimetric determination of airborne particulates\u003cbr\u003e\r\n\u003cbr\u003e\r\nGrade GF\/A binder-free Whatman glass microfiber filters are available in a wide range of sizes in circles and sheets.\u003cbr\u003e\r\n\u003cbr\u003e\r\nFind the right particle retention rating and thickness for your analysis in the Whatman binder-free glass microfiber range.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660017721635,"sku":"WHAT1820-025","price":32.2,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1820-xxx.jpg?v=1785203447"},{"product_id":"grade-1-qualitative-filter-paper-standard-grade-circle-12-5cm","title":"Whatman™ Grade 1 Qualitative Filter Paper Standard Whatman™ Grade, circle, 12.5cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nWhatman™ Grade 1 Qualitative Filter Papers are the most widely used filter paper for routine laboratory applications, qualitative analytical separations, and clarifying liquids. They are the standard grade cellulose filter papers for medium flow rates.\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Qualitative analytical separations for precipitates such as lead sulfate, calcium oxalate (hot), and calcium carbonate\u003cbr\u003e\r\n•Agricultural soil analysis and seed testing procedures\u003cbr\u003e\r\n•Industrial food processing techniques to extract liquid or separate solid foodstuffs from associated liquid\u003cbr\u003e\r\n•Air pollution monitoring by collecting atmospheric dust from airflow and photometrically measuring the stain-intensity\u003cbr\u003e\r\n•Gas detection by quantitative chromogenesis with optical reflectance\u003cbr\u003e\r\n\u003cbr\u003e\r\n\u003cbr\u003e\r\nMedium flow rate and retention for a wide range of qualitative analytical separations\u003cbr\u003e\r\nGrade 1 Qualitative Filter Papers (11 µm particle retention) are available in a variety of sizes and formats including circles, sheets and prepleated filters. They are also available in FilterCup format, a convenient, 250 ml capacity disposable 70 mm filter funnel molded from polypropylene with an integral, heat-bonded filter.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660017787171,"sku":"WHAT1001-125","price":17.4,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1001-047_b206e15a-b932-4140-9ac0-00aaa0b1ad57.jpg?v=1788490231"},{"product_id":"grade-5-qualitative-filter-paper-standard-grade-circle-24cm","title":"Whatman™ Grade 5 Qualitative Filter Paper Standard Whatman™ Grade, circle, 24cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nA standard grade clarifying filter excellent for cloudy suspensions and for water and soil analysis.\u003cbr\u003e\r\nThese cellulose filters are used in qualitative analytical techniques to determine and identify materials. Prepleated qualitative filters are also available, which give improved flow rate and increased loading capacity compared to equivalent flat filters.\u003cbr\u003e\r\n\u003cbr\u003e\r\nGrade 5: 2.5 µm\u003cbr\u003e\r\nThe maximum degree of fine particle filtration in the qualitative range. Capable of retaining the fine precipitates encountered in chemical analysis. Slow flow rate. Excellent clarifying filter for cloudy suspensions and for water and soil analysis. Also available prepleated as Grade 5V.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660017819939,"sku":"WHAT1005-240","price":107.8,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1005.jpg?v=1788490234"},{"product_id":"grade-113-qualitative-filter-paper-wet-strengthened-circle-11cm","title":"Whatman™ Grade 113 Qualitative Filter Paper Wet-Strengthened, circle, 11cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nUltra high loading capacity with a particle retention well suited for use with coarse or gelatinous precipitates. Fastest flow rate of the qualitative grades. Creped surface. Thickest filter paper in the qualitative range.\u003cbr\u003e\r\nThese extremely strong filter papers have a high wet strength due to the addition of a small quantity of chemically stable resin. Normal qualitative applications will not introduce any significant impurities into the filtrate. The resins do, however, contain nitrogen so these grades should not be used in Kjeldahl estimations, etc. Some wet strengthened grades are available in folded (prepleated) forms.\u003cbr\u003e\r\n\u003cbr\u003e\r\nThis filter is also available in the FilterCup, a convenient, disposable 70 mm filter funnel with a 250 ml capacity, molded from polypropylene with an integral, heat bonded filter. Also available as Grade 113V.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660017885475,"sku":"WHAT1113-110","price":30.1,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1113-110.jpg?v=1785203450"},{"product_id":"cellulose-nitrate-membrane-circle-plain-0-45-µm-pore-size-25-mm","title":"Cellulose Nitrate Membrane Circle, plain, 0.45 µm pore size, 25mm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nCytiva's Whatman™ cellulose nitrate membrane filters offer:\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Narrow sub-micron pore size distribution for improved surface capture and analysis.\u003cbr\u003e\r\n•Low extractable levels to ensure sample integrity.\u003cbr\u003e\r\n\u003cbr\u003e\r\nStandard membrane filter for most applications involving particles and cells from 0.1 µm to 12.0 µm.Standard membrane filter for most applications involving particles and cells from 0.1 µm to 12.0 µm.\u003cbr\u003e\r\n\u003cbr\u003e\r\nNarrow pore size distribution - Very fine particles can be retained for recovery or microscopic viewing.\u003cbr\u003e\r\n\u003cbr\u003e\r\nIncreased temperature stability - Temperature-resistant cellulose nitrate can withstand autoclaving up to 121°C with no loss in integrity.\u003cbr\u003e\r\n\u003cbr\u003e\r\nHigh strength and flexibility - Cytiva's cellulose nitrate membranes are manufactured to have strength and flexibility, to prevent tearing during handling and loading, as well as reduced shrinkage during autoclaving, to support physical recovery of deposits.\u003cbr\u003e\r\n\u003cbr\u003e\r\nWhite plain filters - White membrane surface allows colony counting, particle counting, and sterility testing of dark samples.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660017918243,"sku":"WHAT7184-002","price":130.3,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/7184-002.jpg?v=1784614821"},{"product_id":"grade-gf-a-glass-microfiber-filters-binder-free-15cm","title":"Whatman™ Grade GF\/A Glass Microfiber Filters, Binder Free 15cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nWhatman™ Grade GF\/A glass microfiber filters, binder free, feature fine particle retention for a range of liquid and air filtration applications. These have a nominal particle retention of 1.6µm at 98% efficiency and are suited for a variety of applications involving large sample volumes such as:\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Water and air pollution monitoring and wastewater filtering\u003cbr\u003e\r\n•Foodstuff analysis\u003cbr\u003e\r\n•Filtering of algae and bacteria cultures\u003cbr\u003e\r\n•Protein filtration\u003cbr\u003e\r\n•Radioimmunoassay of weak ß emitters\u003cbr\u003e\r\n•Gravimetric determination of airborne particulates\u003cbr\u003e\r\n\u003cbr\u003e\r\nGrade GF\/A binder-free Whatman glass microfiber filters are available in a wide range of sizes in circles and sheets.\u003cbr\u003e\r\n\u003cbr\u003e\r\nFind the right particle retention rating and thickness for your analysis in the Whatman binder-free glass microfiber range.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660017951011,"sku":"WHAT1820-150","price":202.7,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1820-xxx_a0239b3e-ec02-48b6-82d7-479760ad003f.jpg?v=1785203452"},{"product_id":"grade-1-qualitative-filter-paper-standard-grade-circle-24-0cm","title":"Whatman™ Grade 1 Qualitative Filter Paper Standard Whatman™ Grade, circle, 24.0cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nWhatman™ Grade 1 Qualitative Filter Papers are the most widely used filter paper for routine laboratory applications, qualitative analytical separations, and clarifying liquids. They are the standard grade cellulose filter papers for medium flow rates.\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Qualitative analytical separations for precipitates such as lead sulfate, calcium oxalate (hot), and calcium carbonate\u003cbr\u003e\r\n•Agricultural soil analysis and seed testing procedures\u003cbr\u003e\r\n•Industrial food processing techniques to extract liquid or separate solid foodstuffs from associated liquid\u003cbr\u003e\r\n•Air pollution monitoring by collecting atmospheric dust from airflow and photometrically measuring the stain-intensity\u003cbr\u003e\r\n•Gas detection by quantitative chromogenesis with optical reflectance\u003cbr\u003e\r\n\u003cbr\u003e\r\n\u003cbr\u003e\r\nMedium flow rate and retention for a wide range of qualitative analytical separations\u003cbr\u003e\r\nGrade 1 Qualitative Filter Papers (11 µm particle retention) are available in a variety of sizes and formats including circles, sheets and prepleated filters. They are also available in FilterCup format, a convenient, 250 ml capacity disposable 70 mm filter funnel molded from polypropylene with an integral, heat-bonded filter.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660018016547,"sku":"WHAT1001-240","price":57.9,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1001-047_e07712ef-0e4c-4f9d-bc0d-4dc74fb08225.jpg?v=1788490236"},{"product_id":"grade-gf-c-glass-microfiber-filter-110-mm-circle","title":"Whatman™ Grade GF\/C Glass Microfiber Filter, 110mm circle","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nCytiva''s Whatman™ filter paper Grade GF\/C glass filters offer a good flow rate and loading capacity that support total suspended solids analysis.\u003cbr\u003e\r\n\u003cbr\u003e\r\nFilter Paper for Total Suspended Solids:\u003cbr\u003e\r\nWhatman binder free glass microfiber filter grade GF\/C from Cytiva is widely used as a total suspended solids filter for applications testing both potable water and waste water.\u003cbr\u003e\r\n\u003cbr\u003e\r\nBrowse below to find your binder-free Whatman glass filters and the right filter paper to match your laboratory and filtration research needs, or learn more about our ready-to-use GF\/C RTU that is pre-washed and dried but not weighed. The GF\/C RTU line pre-treats our traditional GF\/C filter with washing, drying, cooling (in a desiccator), and weighing steps aligned to the requirements of EN 872 – the European norm for suspended solids in water testing.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660018082083,"sku":"WHAT1822-110","price":140.3,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1822-090.png?v=1788490240"},{"product_id":"whatman-grade-934-ah-glass-microfiber-filters-9-0cm","title":"Whatman™ Grade 934-AH Glass Microfiber Filters 9.0cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nWhatman Grade 934-AH borosilicate glass microfiber filters feature a smooth surface with high retention efficiency and high flow rates for large-volume liquid filtration.\u003cbr\u003e\r\n\u003cbr\u003e\r\nHigh loading capacity enables efficient filtration of suspended solids:\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Smooth surface: provides efficient precipitate recovery\u003cbr\u003e\r\n•High loading capacity: enables processing of turbid solutions\u003cbr\u003e\r\n•High-grade borosilicate glass microfiber: withstands temperatures up to 550°C\u003cbr\u003e\r\n•Nominal particle retention of 1.5 µm\u003cbr\u003e\r\n•Low fiber shedding\u003cbr\u003e\r\n\u003cbr\u003e\r\nReady-to-use (RTU) formats available for Total Suspended Solid (TSS), Total Dissolved Solids (TDS) and Total Suspended Volatiles (VSS).\u003cbr\u003e\r\n\u003cbr\u003e\r\nWhatman Grade 934-AH filters are well suited for large-volume filtration. Applications include cell harvesting, liquid scintillation counting, air pollution monitoring, and water pollution monitoring.\u003cbr\u003e\r\n\u003cbr\u003e\r\nWhatman Grade 934-AH binder-free glass microfiber filters are available in a wide range of sizes in circles and sheets.\u003cbr\u003e\r\n\u003cbr\u003e\r\nDiscover other binder-free Whatman glass microfiber filters. Options are available with different wet strengths, loading capacities, filtration speeds, and particle retentions.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660018114851,"sku":"WHAT1827-090","price":191.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1827-xxx_2fd31a2f-0aa1-4420-9f16-1eeadc7a61b2.jpg?v=1785203455"},{"product_id":"nylon-filter-discs-47mm-0-8µm","title":"Nylon filter discs 47mm 0.8µm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nHigh-quality nylon membranes are suitable for filtering aqueous solutions and most organic solvents. The membranes are suitable for use with a wide range of biological preparations and can be used where other membranes are unsuitable or difficult to use. Nylon membranes are hydrophilic, removing the need for wetting agents that could be extracted when filtering aqueous solutions. The membranes are flexible, durable, tear resistant, and autoclavable. Due to good chemical compatibility and low extractables the membrane is suitable for filtration of organic solvents and sample preparation. Applications include: filtration of aqueous and organic mobile phases, vacuum degassing, filtration of tissue culture media, microbiological media, buffers, and solutions.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660018180387,"sku":"WHAT7408-004","price":233.7,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/7402-002.jpg?v=1785203460"},{"product_id":"grade-gf-a-glass-microfiber-filters-binder-free-11-0cm","title":"Whatman™ Grade GF\/A Glass Microfiber Filters, Binder Free 11.0cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nWhatman™ Grade GF\/A glass microfiber filters, binder free, feature fine particle retention for a range of liquid and air filtration applications. These have a nominal particle retention of 1.6µm at 98% efficiency and are suited for a variety of applications involving large sample volumes such as:\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Water and air pollution monitoring and wastewater filtering\u003cbr\u003e\r\n•Foodstuff analysis\u003cbr\u003e\r\n•Filtering of algae and bacteria cultures\u003cbr\u003e\r\n•Protein filtration\u003cbr\u003e\r\n•Radioimmunoassay of weak ß emitters\u003cbr\u003e\r\n•Gravimetric determination of airborne particulates\u003cbr\u003e\r\n\u003cbr\u003e\r\nGrade GF\/A binder-free Whatman glass microfiber filters are available in a wide range of sizes in circles and sheets.\u003cbr\u003e\r\n\u003cbr\u003e\r\nFind the right particle retention rating and thickness for your analysis in the Whatman binder-free glass microfiber range.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660018311459,"sku":"WHAT1820-110","price":110.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1820-xxx_39a1662c-fd21-42cd-a708-ac4b01f195d0.jpg?v=1785203466"},{"product_id":"nylon-filter-discs-47mm-0-45µm","title":"Nylon filter discs 47mm 0.45µm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nHigh-quality nylon membranes are suitable for filtering aqueous solutions and most organic solvents. The membranes are suitable for use with a wide range of biological preparations and can be used where other membranes are unsuitable or difficult to use. Nylon membranes are hydrophilic, removing the need for wetting agents that could be extracted when filtering aqueous solutions. The membranes are flexible, durable, tear resistant, and autoclavable. Due to good chemical compatibility and low extractables the membrane is suitable for filtration of organic solvents and sample preparation. Applications include: filtration of aqueous and organic mobile phases, vacuum degassing, filtration of tissue culture media, microbiological media, buffers, and solutions.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660018475299,"sku":"WHAT7404-004","price":218.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/7402-002_25bdc533-f582-4312-8201-3035cb9118b4.jpg?v=1785203468"},{"product_id":"grade-6-qualitative-filter-paper-standard-grade-circle-15cm","title":"Whatman™ Grade 6 Qualitative Filter Paper Standard Whatman™ Grade, circle, 15cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nA standard grade filter for boiler water analysis.\u003cbr\u003e\r\nThese cellulose filters are used in qualitative analytical techniques to determine and identify materials. Prepleated qualitative filters are also available, which give improved flow rate and increased loading capacity compared to equivalent flat filters.\u003cbr\u003e\r\n\u003cbr\u003e\r\nTwice as fast as Grade 5 with similar fine particle retention. Often specified for boiler water analysis applications.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660018540835,"sku":"WHAT1006-150","price":35.1,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1006.jpg?v=1788490242"},{"product_id":"grade-1-qualitative-filter-paper-standard-grade-circle-9-0cm","title":"Whatman™ Grade 1 Qualitative Filter Paper Standard Whatman™ Grade, circle, 9.0cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nWhatman™ Grade 1 Qualitative Filter Papers are the most widely used filter paper for routine laboratory applications, qualitative analytical separations, and clarifying liquids. They are the standard grade cellulose filter papers for medium flow rates.\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Qualitative analytical separations for precipitates such as lead sulfate, calcium oxalate (hot), and calcium carbonate\u003cbr\u003e\r\n•Agricultural soil analysis and seed testing procedures\u003cbr\u003e\r\n•Industrial food processing techniques to extract liquid or separate solid foodstuffs from associated liquid\u003cbr\u003e\r\n•Air pollution monitoring by collecting atmospheric dust from airflow and photometrically measuring the stain-intensity\u003cbr\u003e\r\n•Gas detection by quantitative chromogenesis with optical reflectance\u003cbr\u003e\r\n\u003cbr\u003e\r\n\u003cbr\u003e\r\nMedium flow rate and retention for a wide range of qualitative analytical separations\u003cbr\u003e\r\nGrade 1 Qualitative Filter Papers (11 µm particle retention) are available in a variety of sizes and formats including circles, sheets and prepleated filters. They are also available in FilterCup format, a convenient, 250 ml capacity disposable 70 mm filter funnel molded from polypropylene with an integral, heat-bonded filter.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660018671907,"sku":"WHAT1001-090","price":14.8,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1001-047_a1606fbb-bb38-48e0-a22b-dbb89d4a2d53.jpg?v=1788490244"},{"product_id":"grade-6-qualitative-filter-paper-standard-grade-circle-9cm","title":"Whatman™ Grade 6 Qualitative Filter Paper Standard Whatman™ Grade, circle, 9cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nA standard grade filter for boiler water analysis.\u003cbr\u003e\r\nThese cellulose filters are used in qualitative analytical techniques to determine and identify materials. Prepleated qualitative filters are also available, which give improved flow rate and increased loading capacity compared to equivalent flat filters.\u003cbr\u003e\r\n\u003cbr\u003e\r\nTwice as fast as Grade 5 with similar fine particle retention. Often specified for boiler water analysis applications.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660018704675,"sku":"WHAT1006-090","price":18.4,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1006_e2d1a476-0538-40ce-b637-70bf4b14531b.jpg?v=1788490248"},{"product_id":"grade-91-qualitative-filter-paper-wet-strengthened-circle-125-mm-subdivided-into-100","title":"Whatman™ Grade 91 Qualitative Filter Paper Wet-Strengthened, circle, 125mm (subdivided into 100)","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nA general purpose creped filter for less critical routine analysis. Widely used to assay sucrose in cane sugar and within pharmaceutical laboratories for routine filtration.\u003cbr\u003e\r\nThese extremely strong filter papers have a high wet strength due to the addition of a small quantity of chemically stable resin. Normal qualitative applications will not introduce any significant impurities into the filtrate. The resins do, however, contain nitrogen so these grades should not be used in Kjeldahl estimations, etc. Some wet strengthened grades are available in folded (prepleated) forms.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660018835747,"sku":"WHAT1091-125","price":561.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1091-125.jpg?v=1784614828"},{"product_id":"grade-gf-a-glass-microfiber-filters-binder-free-4-25cm","title":"Whatman™ Grade GF\/A Glass Microfiber Filters, Binder Free 4.25cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nWhatman™ Grade GF\/A glass microfiber filters, binder free, feature fine particle retention for a range of liquid and air filtration applications. These have a nominal particle retention of 1.6µm at 98% efficiency and are suited for a variety of applications involving large sample volumes such as:\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Water and air pollution monitoring and wastewater filtering\u003cbr\u003e\r\n•Foodstuff analysis\u003cbr\u003e\r\n•Filtering of algae and bacteria cultures\u003cbr\u003e\r\n•Protein filtration\u003cbr\u003e\r\n•Radioimmunoassay of weak ß emitters\u003cbr\u003e\r\n•Gravimetric determination of airborne particulates\u003cbr\u003e\r\n\u003cbr\u003e\r\nGrade GF\/A binder-free Whatman glass microfiber filters are available in a wide range of sizes in circles and sheets.\u003cbr\u003e\r\n\u003cbr\u003e\r\nFind the right particle retention rating and thickness for your analysis in the Whatman binder-free glass microfiber range.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660018868515,"sku":"WHAT1820-042","price":46.8,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1820-xxx_61e653c8-af0d-4bc1-8917-1f87e993d869.jpg?v=1785203477"},{"product_id":"grade-3-qualitative-filter-paper-standard-grade-circle-5-5cm","title":"Whatman™ Grade 3 Qualitative Filter Paper Standard Whatman™ Grade, circle, 5.5cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nA standard grade filter used in qualitative analytical techniques to determine and identify materials. For use in büchner funnels.\u003cbr\u003e\r\nPrepleated qualitative filters are also available, which give improved flow rate and increased loading capacity compared to equivalent flat filters.\u003cbr\u003e\r\n\u003cbr\u003e\r\nGrade 3: 6 µm\u003cbr\u003e\r\nDouble the thickness of Grade 1 with still finer particle retention and excellent loading capacity; more precipitate can be held without clogging. The extra thickness gives increased wet strength and makes this grade highly suitable for use in Büchner funnels. The high absorbency is particularly valuable when the paper is used as a sample carrier. This filter is also available in the FilterCup. This is a convenient, disposable 70 mm filter funnel with a 250 ml capacity molded from polypropylene with an integral, heat bonded filter (catalog number 1600-003).\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660019065123,"sku":"WHAT1003-055","price":18.5,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1003.jpg?v=1788490251"},{"product_id":"grade-542-ashless-fine-precipitate-filter-circle-9cm","title":"Whatman™ Grade 542 Ashless Fine Precipitate FIlter, circle, 9cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nCytiva''s Whatman Grade 542 filters are acid hardened to allow high retention of fine precipitates in applications such as metal determinations and hydroxide collection.\u003cbr\u003e\r\n\u003cbr\u003e\r\n•High wet-strength\u003cbr\u003e\r\n•Acid-hardened for resistance to strong acid and alkali solutions\u003cbr\u003e\r\n•Nominal particle retention rating of 2.7 µm\u003cbr\u003e\r\n•Herzberg filtration speed of 2510 s\u003cbr\u003e\r\n•Extremely low ash content (0.006% ash maximum)\u003cbr\u003e\r\n\u003cbr\u003e\r\nAlong with Grade 542 cellulose filter paper, the Whatman range of hardened quantitative papers from Cytiva''s business includes fast Grade 541 and general-purpose Grade 540 filters. All three grades are designed for use in quantitative analysis with strong acid\/alkali solutions.\u003cbr\u003e\r\n\u003cbr\u003e\r\nSlow flow rate filters for gravimetric determination\u003cbr\u003e\r\nHardened Grade 542 quantitative papers enable high retention of fine particles in chemically harsh conditions. When acting as a gravimetric filter, this cellulose filter paper is therefore well suited for use in capturing fine precipitates in applications such as metal determinations and hydroxide collection.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660019228963,"sku":"WHAT1542-090","price":44.2,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1542-090.jpg?v=1785219614"},{"product_id":"grade-5-qualitative-filter-paper-standard-grade-circle-15cm","title":"Whatman™ Grade 5 Qualitative Filter Paper Standard Whatman™ Grade, circle, 15cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nA standard grade clarifying filter excellent for cloudy suspensions and for water and soil analysis.\u003cbr\u003e\r\nThese cellulose filters are used in qualitative analytical techniques to determine and identify materials. Prepleated qualitative filters are also available, which give improved flow rate and increased loading capacity compared to equivalent flat filters.\u003cbr\u003e\r\n\u003cbr\u003e\r\nGrade 5: 2.5 µm\u003cbr\u003e\r\nThe maximum degree of fine particle filtration in the qualitative range. Capable of retaining the fine precipitates encountered in chemical analysis. Slow flow rate. Excellent clarifying filter for cloudy suspensions and for water and soil analysis. Also available prepleated as Grade 5V.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660019687715,"sku":"WHAT1005-150","price":35.5,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1005_78a8f8e3-3461-4d94-8984-ee9202aa848e.jpg?v=1788490254"},{"product_id":"whatman-grade-934-ah-glass-microfiber-filters-rtu-47mm","title":"Whatman™ Grade 934-AH Glass Microfiber Filters RTU 47mm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nOur Whatman glass microfiber filter papers in grade 934-AH RTU have been pre-washed, dried (or ignited), cooled, desiccated and weighed, which eliminates the pre-treating steps that are otherwise required by the US EPA Laboratory Standard Method 2540 parts C, D, and E. These glass microfiber filter papers have fine particle retention of 1.5 µm at high flow rates to process heavy, turbid samples.\u003cbr\u003e\r\n\u003cbr\u003e\r\nOur Whatman filter papers 934-AH family of products come in three different varieties:\u003cbr\u003e\r\n\u003cbr\u003e\r\n•934-AH RTU for Suspended and Dissolved Solids—pre-washed, dried, cooled, and weighed filters with certified mass loss between washing and drying steps of the lesser of less than 0.5 mg or 4% in accordance with US EPA Lab Standard Method 2540 parts C and D. (Most filters come weighed to four decimal places, however a version of the 47 mm glass microfiber filter can be measured to five decimal places if needed.)\u003cbr\u003e\r\n•Ready-to-use for Volatiles—pre-washed, pre-weighed and pre-fired at 550°C aligned to US EPA Laboratory Standard Method 2540 parts C, D, and E.\u003cbr\u003e\r\n•RTU Double Weigh—drying, cooling and filter paper weighing steps repeated twice for customers with the highest regulatory concern.\u003cbr\u003e\r\n•Economy versions of 934-AH RTU dissolved, suspended, and volatiles testing filters are also available. These filter papers are pre-washed and dried but not weighed and do not come with barcodes.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660019818787,"sku":"WHAT9907-047","price":190.5,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/9907-047.jpg?v=1784614831"},{"product_id":"nuclepore-hydrophilic-membrane-0-2-µm-pore-size-19-mm-circle","title":"Nuclepore Hydrophilic Membrane, 0.2 µm pore size, 19mm circle","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nWhatman™ Nuclepore™ track-etched membrane filters offer a highly defined pore size cutoff in the sub-micron range, enabling particle deformity measurement and capture of extremely small particles. These membranes come in a range of pores sizes and diameters and are also available in sheet format. Whatman™ Nuclepore™ membranes are suitable for a wide range of sample types and applications, including bioassays, microscopy, cytology, parasitology, certain air and oceanography analyses, cell biology, cell culture and chemotaxis, and environment analysis.\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Track-etched for highly defined pore size and high pore density\u003cbr\u003e\r\n•Low protein binding and low extractables, minimizing filtration sample contamination risk\u003cbr\u003e\r\n•High chemical resistance and good thermal stability for a wide range of sample types\u003cbr\u003e\r\n•Low, consistent ash and low tare weights\u003cbr\u003e\r\n•Smooth flat membrane surface for high particle visibility\u003cbr\u003e\r\n\u003cbr\u003e\r\nNuclepore™ track-etched polycarbonate membranes are manufactured from high-quality polycarbonate film and have sharply defined pore sizes, high flow rates, and excellent chemical and thermal resistance. The membranes have a smooth flat surface and exhibit very low levels of extractables. The thin and uniform cylindrical pores also facilitate rapid cell migration.\u003cbr\u003e\r\n\u003cbr\u003e\r\nThe hydrophilic membrane filters are manufactured from high-quality polycarbonate film track-etched membrane for high nominal pore size precision and are treated with polyvinylpyrrolidone (PVP).\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660019884323,"sku":"WHAT10417004","price":157.8,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/10417004_423217ce-ea81-491c-9f9c-c14027ce3588.jpg?v=1785203489"},{"product_id":"grade-gf-d-glass-microfiber-prefilter-4-7cm-circle","title":"Whatman™ Grade GF\/D Glass Microfiber Prefilter, 4.7cm circle","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nCytiva''s Whatman Grade GF\/D fine membrane filters are thick and offer good loading capacity. GF\/D can also function as a prefilter when used with GF\/B, and it comes in many sizes to fit most filter holders.\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Thick filter media for increased loading capacity\u003cbr\u003e\r\n•Nominal particle retention of 2.7 µm\u003cbr\u003e\r\n•Can be used as a fine membrane prefilter\u003cbr\u003e\r\n\u003cbr\u003e\r\nCytiva offers glass microfiber filters with a range of pore sizes and thicknesses. Browse other binder-free Whatman glass filters to find the right filters for your needs.\u003cbr\u003e\r\n\u003cbr\u003e\r\nFine membrane prefilter benefits\u003cbr\u003e\r\nWhatman Grade GF\/D from Cytiva''s business is a membrane prefilter that provides protection for membranes with fine retention. The filter can be used with Whatman Grade GF\/B filters to provide efficient membrane protection, especially during liquid scintillation counting.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660019917091,"sku":"WHAT1823-047","price":83.1,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1823-110.jpg?v=1785203492"},{"product_id":"quartz-air-sampling-filter-grade-qm-a-47-mm-circle","title":"Quartz Air Sampling Filter, Grade QM-A, 47mm circle","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nCytiva''s high-purity quartz microfiber filters are used in many air sampling filter applications, including sampling of acidic gases, stacks, flues, and aerosols. Filters are suitable for PM-10 sampling and analysis.\u003cbr\u003e\r\n•Temperature resistant up to 800°C\u003cbr\u003e\r\n•Binder-free\u003cbr\u003e\r\n\u003cbr\u003e\r\nWhatman quartz microfiber filters\u003cbr\u003e\r\nBecause of the low level of alkaline earth metals, \"artifact\" products of sulfates and nitrates (from SO2 and NO2) are virtually eliminated. High-purity quartz microfiber filters are therefore applicable for particulate monitoring and heavy metal analysis.\u003cbr\u003e\r\n\u003cbr\u003e\r\nWhatman QM-A filter circles and sheets\u003cbr\u003e\r\nQM-A quartz microfiber filters from Cytiva come in a wide range of circle diameters, as well as 25-piece sheets. QM-A sheets (1851-8866) are sequentially numbered according to U.S. Environmental Protection Agency (EPA) standards and are suitable for most applications.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660020244771,"sku":"WHAT1851-047","price":271.3,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/1851-047.jpg?v=1785203495"},{"product_id":"whatman-1ps-phase-separator-papers-9-0cm","title":"Whatman™ 1PS Phase Separator Papers 9.0cm","description":"\u003cp\u003eOverview\u003cbr\u003e\r\nWhatman 1PS Phase Separator from Cytiva''s business is a hydrophobic filter for routine solvent extraction. Within seconds it retains aqueous phases, while solvent phases flow through.\u003cbr\u003e\r\n\u003cbr\u003e\r\n•Impregnated with stabilized silicone to create a hydrophobic filter\u003cbr\u003e\r\n•Multiple separations can be processed in parallel\u003cbr\u003e\r\n•No special training required\u003cbr\u003e\r\n•Can replace a separatory funnel in certain applications\u003cbr\u003e\r\n\u003cbr\u003e\r\nHydrophobic solvent extraction paper\u003cbr\u003e\r\nSolvent extraction can be time-consuming and messy when numerous separations are required. Cytiva''s Whatman 1PS Phase Separator is impregnated with stabilized silicone, creating a hydrophobic filter paper that can replace separatory funnel use in certain applications.\u003cbr\u003e\r\n\u003cbr\u003e\r\nRapid solvent extraction\u003cbr\u003e\r\nMixed phases are poured directly into the Whatman 1PS Phase Separator filter. The solvent phase flows through the paper quickly and cleanly, automatically stopping after the process is complete; all of the aqueous phase is retained. Droplets are automatically separated within seconds.\u003c\/p\u003e","brand":"Whatman","offers":[{"title":"Default Title","offer_id":53660020310307,"sku":"WHAT2200-090","price":44.5,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/files\/2200-090_132a271e-80ed-4172-878f-c90664efb759.jpg?v=1785203499"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/5896\/9012\/collections\/WHAT1825_ea15e156-d68d-4476-8d1e-2d103d7f8fbb.jpg?v=1756951755","url":"https:\/\/onelab.co.nz\/collections\/papers-membranes.oembed?page=6","provider":"Onelab","version":"1.0","type":"link"}