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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:
11.0cm 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:
7.0cm diameter. Slightly grained surface. Moderately thick. Highly absorbent. Highly suitable for use in Buchner funnels. Medium porosity. Medium flow rate. 6um particle retention.
Description:
18.5cm 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:
1PS Phase Separator, Type: circle, Dimensions: 90 mm, Flow rate:Medium, high-grade filter paper impregnated with a stabilized silicone that renders it hydrophobic, retaining the aqueous phase and passing the solvent phase through, for Solvent Extraction
Description:
For general chromatography uses. Smooth, white, normally-hard surface. Flow Rate: 130mm/30 minutes (water). Paper Thickness: 0.18mm. Roll Size: 1cmx100m.
Description:
Standard Grades Grade 1 circles, 25 mm, 400/pk, the most widely used filter paper for routine applications with medium retention and flow rate.
Description:
11.0cm diameter. Silicone impregnated paper functions as a rapid phase separator in place of conventional separatory funnels. Paper retains aqueous phase and passes through hydrophobic phase. Medium porosity. Medium flow rate. 11um particle retention.
Description:
18.5cm diameter. Pure cotton linter filter. High wet strength and very smooth surface. Releases virtually no fibers. For vacuum and pressure filtration. Resistant against acidic and alkaline solutions. Coarse porosity. Fast flow rate. 12-25um particle retention.
Description:
Qualitative Filter Paper. The most widely used Filter Paper in the Whatman range. Medium retention and flow rate. Extended range of circle sizes from 2 to 50 cm diameter. Sheets and strips also available.
Description:
Reeve Angel Brand Filter Papers Grade 202, 24 cm. Provides minimum filtration speed of coarse particles. The surfaced is creped, hence it has a greater true surface area than smooth surface Filter Paper of the same diameter.
Description:
Quantitative Filter Paper. 16 u m. Intermediate in retention between No. 40 and No. 41, and twice as fast as No. 40Intermediate in retention between No. 40 and No. 41, and twice as fast as No. 40
Description:
For electrophoresis and blotting procedures. White surface. Flow Rate: 130mm/30 minutes (water). Paper Thickness: 0.34mm. Roll Size: 7.5cmx100m.
Description:
15.0cm diameter. For coarse particles and gelatinous precipitates. Thick and strong. High loading capacity. High wet strength. Creped surface. Not for nitrogen determinations. Coarse porosity. Faster flow rate than other qualitative grades. 30um particle retention.
Description:
24.0cm 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.
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