Skip to content Skip to navigation menu

High-purity, Qualitative Filter Papers

These paper grades are used for analytical purposes that require a low ash content.

Grades 292 and 292a are especially suitable for soil analyses because they are low in nitrogen. For phosphate or sodium determination, we recommend grades 131 and 132.

   

Choose your product

Products (0)

Results per page: | |

Grade

Material

Weight (g/m²)

Thickness

(mm)

Wet
bursting
strength
(
kPa)

Ash
content

(%)

Particle
retention (µm)

Properties

131

Refined pulp and Linters

80

0.16

20

< 0.02

3 - 5

Narrow pored, slow rate of filtration, with a chloride content (hot extract) of < 0.006 %.

132

Refined pulp and Linters

80

0.17

20

< 0.02

5 - 8

Medium pored, medium-slow rate of filtration, with a chloride content (hot extract) of < 0.006 %.

292

Cotton Linters

87

0.18

5

< 0.06

5 - 8

Medium pored, medium-slow rate of filtration

292a

Cotton Linters

97

0.19

5

< 0.06

4 - 7

Medium to narrow pored, medium-slow rate of filtration