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Made of pure cellulose treated with hydrochloric and hydrofluoric acid, filter papers are used for straining with good retention and flow rates. These cellulose filters create a semi-permeable barrier perpendicular to a liquid or airflow in order to separate fine substances from liquids or air. Different grades of filter paper are available for performing various laboratory applications including routine lab work, ranging from coarse to fine filtration of particulates. VWR offers a wide range of qualitative and quantitative filter papers with varying pore size, particle retention, flow rate and filtration times.
Description:
18.5cm diameter. Rough, dense paper for fine crystalline materials like calcium fluoride, zinc sulfide, benzidine sulfate, and for chromatography of compounds with similar Rf values. Ashless. Fine porosity. Fast flow. >12-25um particle retention.
Description:Filter Paper, good quality paper recommended for student use and all routine filtering operations, Its medium retention and flow rate makes it particularly suitable for chromatography, Medium Flow, 25 cm diameter, Pore Size: 6 Micron
Description:
Qualitative Filter Paper. 20-25 um. Extremely fast filtering with excellent retention of coarse particles and gelatinous precipitates such as ferric hydroxide and aluminum hydroxide.
Description:
Thin filter paper, medium-fast with medium to fine particle retention. Used for many routine analytical applications in different industries
Description:
Qualitative Filter Papers. 25 um. Only half the thickness of No. 113 and suitable for coarse or gelatinous precipitates. Smooth surface for easy recovery of precipitates.
Description:
Qualitative Filter Paper, Grade 4, Standard Grade, roll, 38 x 114 mm, 63mm, 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 .
Description:
Standard Grades Grade 1 sheets, 47 cm x 100 m, 100/pk, the most widely used filter paper for routine applications with medium retention and flow rate.
Description:
Quantitative Filter Papers. 8 um. The general purpose hardened ashless Filter Paper with medium retention and flow rate. Extremely pure and strong with a hard surface. High chemical resistance to strong acid and alkali.
Description:
18.5cm diameter. For coarse particles or gelatinous precipitates. For iron or aluminum hydroxides. For air pollution analysis as a paper tape for impregnation when determining gaseous compounds. Coarse porosity. Fast flow rate. 20-25um particle retention.
Description:
11.0cm diameter. Thin, smooth, hardened, paper has high wet strength. Retains fine crystalline precipitates. For qualitative or quantitative filtrations requiring vacuum assistance. Withstands scraping. Fine porosity. Slow flow. 2.7um particle retention.
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