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Filter Papers

7 cm QUANT. (Ashless), Medium filtration speed / Medium porosity.
Whatman grade 40 equivalent. Ash content approx. 0.01% (negligible). Pre-washed 2x in acid and rinsed in dH₂O. For quantitative work (gravimetric analysis).
Pack of 100 circles.
#FP2027 ................. $4.99 / pack

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7 cm QUAL. (Low-Ash), Slow filtration speed / Fine porosity.
Ash content 0.15%. For qualitative work with fine crystalline precipitates.
Pack of 100 circles.
#FP1037 .................... $2.84 / pack

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7 cm QUALITATIVE, Medium filtration speed / Medium porosity. Ash content 0.15%. The most popular grade for all-around qualitative work.
Pack of 100 circles.
#FP1027 ..................... $2.84 / pack

9 cm QUANT. (Ashless), Medium / Medium.
Whatman grade 40 equivalent. Ash content approx. 0.01% (negligible). Pre-washed 2x in acid and rinsed in dH₂O. For quantitative work (gravimetric analysis).
Pack of 100 circles.
#FP2029 .............. $6.99 / pack

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9 cm QUAL. (Low-Ash), Slow / Fine.
Ash content 0.15%. For qualitative work with fine crystalline precipitates.
Pack of 100 circles.
#FP1039 ................ $3.84 / pack

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9 cm QUAL. (Low-Ash), Medium / Medium.
Most popular grade for all-around qualitative lab work. Pack of 100 circles.
#FP1029 ................ $3.84 / pack

Vacuum Pumps for filtration are on their own page

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