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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:
7.0cm diameter. For gravimetric analyses of cement, clay, iron, and steel, as a primary filter in soil analysis, for determination of sediment in milk, and to clean prior to AA spectrophotometry. Medium porosity. Medium flow rate. 8um particle retention.
Description:
Qualitative Filter Paper. 2.5 um. The maximum degree of fine particle filtration in the qualitative range. Capable of retaining the fine precipitates encountered in chemical analysis. Slow flow rate.
Description:
9.0cm diameter. For critical gravimetric analysis. Widely used for precipitates with tendencies toward colloidal dispersion. Suitable for gravity or low suction filtration. Fine porosity. Slow flow rate. 2.5um particle retention.
Description:
5.5cm diameter. Slightly grained surface. Moderately thick. Highly absorbent. Highly suitable for use in Buchner funnels. Medium porosity. Medium flow rate. 6um particle retention.
Description:
For electrophoresis and blotting procedures. White surface. Flow Rate: 130mm/30 minutes (water). Paper Thickness: 0.34mm. Sheet Size: 20x25cm.
Description:
4.7cm 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:
24.0cm diameter. Very useful in clarification of cloudy solutions. Widely used in water analysis. Fine porosity. Slow flow rate. 2.5um particle retention.
Description:
32.0cm diameter. For rapid filtering with excellent retention of coarse particles and gelatinous precipitates. Good rapid filter for cleanup of biological fluids or organic extracts. For air pollution monitoring. Coarse porosity. Fast flow rate. 20-25um particle retention.
Description:
11.0cm diameter. Very useful in clarification of cloudy solutions. Widely used in water analysis. Fine porosity. Slow flow rate. 2.5um particle retention.
Description:
15.0cm diameter. Ashless paper for gravimetric analysis with very fine particle retention. Thinner than Grade 42 with lower ash weight per sample and almost twice the flow rate. Fine porosity. Slow flow rate. 3um particle retention.
Description:
5.5cm diameter. Hardened, low ash paper for gelatinous precipitates and coarse particles. High wet strength makes this grade suitable for fast vacuum assisted filtration. Coarse porosity. Fast flow rate. 20-25um particle retention.
Description:
For electrophoresis and blotting procedures. White surface. Flow Rate: 130mm/30 minutes (water). Paper Thickness: 0.34mm. Sheet Size: 11x14cm.
Description:
12.5cm diameter. Hardened, low ash paper for gelatinous precipitates and coarse particles. High wet strength makes this grade suitable for fast vacuum assisted filtration. Coarse porosity. Fast flow rate. 20-25um particle retention.
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:
18.5cm diameter. Slightly grained surface. Moderately thick. Highly absorbent. Highly suitable for use in Buchner funnels. Medium porosity. Medium flow rate. 6um particle retention.
Description:
46x57cm. For a wide range of laboratory applications, liquid clarification, gas filtration, air pollution analysis, and soil analysis. Medium porosity. Medium flow rate. 11um particle retention.
Description:
Qualitative Filter Papers. 30 um. Ultra high loading capacity with a particle retention making it ideal for use with coarse or gelatinous precipitates. Fastest flow rate of the qualitative grades. Creped surface. Thickest Filter Paper in the Whatman range.
Description:
Sheets. Thickness 0.50 mm. Flow rate 225 mm/30 min. Extremely fast. Flow rate is the highest of all chromatography papers in the whatman range. Thick paper with fairly soft surface.
Description:
Quantitative Filter Paper. 20-25 u m. The fastest ashless Filter Paper, recommended for analytical procedures involving coarse particles or gelatinous precipitates (e.g., iron or aluminum hydroxides).
Description:
Qualitative Filter Paper. 30 um. Very thick and strong filter with creped surface for extremely high loading capacity, particularly in folded form. Fastest flow rate of any qualitative grade. Ideal for coarse particles and gelatinous precipitates.
Description:
For electrophoresis and blotting procedures. White surface. Flow Rate: 130mm/30 minutes (water). Paper Thickness: 0.34mm. Sheet Size: 35x43cm.
Description:
18.5cm diameter. Hardened, cotton linter filter with high wet-strength and resistant to acidic and alkaline solutions. Suitable for food and beverage industries. Medium fine porosity. Medium fast flow rate. 4-7um particle retention.
Description:
15.0cm diameter. For gravimetric analyses of cement, clay, iron, and steel, as a primary filter in soil analysis, for determination of sediment in milk, and to clean prior to AA spectrophotometry. Medium porosity. Medium flow rate. 8um particle retention.
Description:
5.5cm diameter. More retentive, slower, and more absorbent than Grade 1 Filter Paper by Whatman*. For general-purpose lab applications, monitoring specific contaminants in the atmosphere, and soil testing. Medium porosity. Medium flow rate. 8um particle retention.
Description:
11.0cm 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.
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