Ashless Filter Paper

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Ashless Filter Paper
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  • Advantec Quantitative Ashless Filter Papers are made from the highest quality alpha cotton cellulose. One critical step in the manufacturing process of these filter papers is acid washing. All grades are double acid washed in hydrochloric then hydrofluoric acid to reduce levels of SiO2, CaO, and…

  • ashless: 0.006% ash maximum. These filters are acid-hardened to give high wet strength and chemical resistance with extremely low ash content. The tough surface makes these filters suitable for a wide range of critical filtration procedures. These are the supreme quantitative filter papers

  • …retention of all Whatman cellulose filter papers from Cytiva . Ashless: 0.007% ash maximum for Grades 40 to 44. These are very pure filters suitable for a wide range of critical analytical filtration procedures. Whatman quantitative filters from Cytiva are designed for gravimetric…

  • …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. Along with fast Grade 541 filter paper, the hardened, ashless range from Cytiva business includes general-purpose…

  • ashless filter paper for your gravimetric analysis needs. See our other ashless grades to find the right filter for your sample, or use our hardened ashless grades if your analysis involves strong acid/alkali suspensions. Applications for high-purity Grade 40 filters High-purity filters

  • … This fastest ashless filter paper is also used in quantitative air pollution analysis as a paper tape for impregnation when determining gaseous compounds at high flow rates. This filter is also available in a disposable filter funnel. This is a convenient, disposable 47 mm filter funnel with a 250…

  • Supreme quantitative filter papers offering medium retention and flow rate. Hardened ashless: 0.006% ash maximum. These filters are acid-hardened to give high wet strength and chemical resistance with extremely low ash content. The tough surface makes these filters suitable for a wide range…

  • …purity from filter to filter. Quantitative analysis Low ash content 0.007% (Acid-wash treated) High wet-strength Consistent performance Custom cut Bulk packaging Ashless Grades (Ash 0.007%) These standard ashless grades are high purity filter papers suitable for…

  • …sample and almost twice the flow rate of Grade 42. Ashless: 0.007% ash maximum for Grades 40 to 44. These are very pure filters suitable for a wide range of critical analytical filtration procedures. Whatman quantitative filters from Cytiva are designed for gravimetric analysis and…

  • …This media family is also widely used in methods to prepare samples for further testing using many types of instrumentation. These ashless filter papers are manufactured from refined pulp and linters. They are acid washed and have an extremely low ash content of <0.01%. CFP40:…

  • … Consistent performance Hardened grades available Custom cut Bulk packaging Ashless Grades (Ash 0.007%) These standard ashless grades are high purity filter papers suitable for routine quantitative gravimetric techniques and in the preparation of samples for use…

  • Whatman Grade 589/3 ashless filter paper fromCytiva is particularly useful in capturing very fine particulate samples such as insoluble molecules in fats or oils or supporting ash free dry mass. High purity ( ‘Blue ribbon filter’ Very fine precipitate retention (class 2d acc. to DIN 53 135) …

  • … Bulk packaging Hardened Ashless Grades (Ash 0.006%) These specially treated hardened ashless grades are available for critical quantitative analytical techniques requiring increased wet-strength and handling capacity. These high purity filter papers have a tough, smooth surface free…

  • …are similar to those of the acid-hardened ashless filter papers. Grade 50: 2.7 µm Retention of very fine crystalline precipitates. The thinnest of all Whatman filter papers. The hardened and highly glazed surface finish keeps the paper free from loose surface fibers. Highly…

  • …column Whatman quantitative filters from Cytiva business are designed for gravimetric analysis. Grade 589/2 Whatman ashless filter paper can also be purchased as pre-pleated 589/2 ½ sheets. General filtration with quantitative papers Grade 589/2 ashless filter paper can be used when medium fine…

  • Oxygen Flask Combustion Unit

    Exeter Analytical

    …is a simple procedure and involves placing a few milliliters of absorbent solution in a flask. The sample is weighed out and placed in an ashless filter paper holder which in turn is placed in a platinum basket attached to the stopper of the flask. The flask is filled with oxygen and the stopper is…

  • …Whatman ashless filter paper grades. Grade 42 is designed for gravimetric analysis and sample preparation for instrumental analysis. Whatman quantitative papers come in a variety of particle retentions. Also see hardened ashless grades for work with strong acids or bases. Ashless paper for…

  • …Grade 41 environmental pollution papers are among the fastest filter papers in the Whatman ashless range. This gravimetric filter is well suited for quantitative analysis of soil and air. Aside from Grade 41 environmental pollution papers, Whatman quantitative paper comes in a variety of particle…

  • Ashless clippings Ashless clippings Whatman ashless filter aids enhance filtration speed by coagulating precipitates or suspensions to form a thick retentive “prefilter” layer on top of normal filter paper. Easily dispersible, the powder is of a purity similar to that of Whatman ashless

  • …41 Cytiva 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. Cytiva offers other ashless grades to ensure that you have the appropriate…

  • …purity from filter to filter. Quantitative analysis Low ash content 0.007% (Acid-wash treated) High wet-strength Consistent performance Custom cut Bulk packaging Ashless Grades (Ash 0.007%) These standard ashless grades are high purity filter papers suitable for…

  • …analysis can be time-consuming when filtration of fine particles is required. Because of its reduced thickness, Grade 44 ashless filter paper fromCytiva provides faster filtration of fine particles when compared with thicker papers of similar retention rating, such as Whatman Grade 42 paper.

  • Quantitative filter papers: Ashless quantitative filter papers are made of refined pulp and cotton linters with over 95% alpha-cellulose content. These filter papers are guaranteed to be free of any residual acids and have an ash content of

  • …general purpose hardened ashless filter paper with medium retention and flow rate. Hardened ashless: 0.006% ash maximum. These filters are acid-hardened to give high wet strength and chemical resistance with extremely low ash content. The tough surface makes these filters suitable for a wide…

  • …Grades 40 and 41, and twice as fast as Grade 40. Ashless: 0.007% ash maximum for Grades 40 to 44. These are very pure filters suitable for a wide range of critical analytical filtration procedures. Whatman quantitative filters from Cytiva are designed for gravimetric analysis and the…

  • …of 50 s*Black ribbon filter’ for fast filtration of coarse precipitatesHigh purity ( *The time taken to filter 100 ml water (20°C) through a filter area of 10 cm² at a constant pressure of 5 cm water column Blaine test filter paper Whatman Grade 589/1 filter papers from Cytiva business are…

  • … Bulk packaging Hardened Ashless Grades (Ash 0.006%) These specially treated hardened ashless grades are available for critical quantitative analytical techniques requiring increased wet-strength and handling capacity. These high purity filter papers have a tough, smooth surface free…

  • … Bulk packaging Hardened Ashless Grades (Ash 0.006%) These specially treated hardened ashless grades are available for critical quantitative analytical techniques requiring increased wet-strength and handling capacity. These high purity filter papers have a tough, smooth surface free…

  • …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. Cytiva business offers hardened ashless filter paper for a variety of precipitate sizes. Along with…

  • …542 cellulose filter paper, the Whatman range of hardened quantitative papers from Cytiva 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. Slow flow rate filters for gravimetric…

  • …suitable for Büchner filtrations where it is desirable to recover the precipitate from the filter surface after filtration. Other characteristics include high wet strength and chemical resistance, which are similar to those of the acid-hardened ashless filter papers. Grade 52: 7 µm

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