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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.

   

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Products (82)

Qualitative Papers/ Grade 132 / ⌀ 320 mm Filter Discs

$54.00

Grade
132
Filter Format
Discs
Qualitative Papers/ Grade 292 / ⌀ 125 mm Folded Filters

$38.00

Grade
292
Filter Format
Folded
Qualitative Papers/ Grade 292 a / ⌀ 270 mm Folded Filters

$81.00

Grade
292 a
Filter Format
Folded
Qualitative Papers/ Grade 132 / ⌀ 185 mm Folded Filters

$39.00

Grade
132
Filter Format
Folded
Qualitative Papers/ Grade 131 / ⌀ 185 mm Folded Filters

$43.00

Grade
131
Filter Format
Folded

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

Brochure

Filter Papers for the Laboratory and Industry
en 9.4 MB
Papiers filtres pour les laboratoires et l'industrie
fr 2.0 MB
Carte da filtro per il laboratorio e l'industria
it 1.9 MB
宣传手册:实验室过滤产品精简目录
zh 19.0 MB

Catalog

Laboratory Filtration Products
en 21.8 MB
Wet-strengthened Filter Papers for Qualitative Analyses

These qualitative filter papers are essentially used for analytical purposes and routine analyses, whenever no gravimetric analyses are required. They are wet-strengthened and can be used for pressure and vacuum filtration. They are made of refined pulp and linters with an > 95% α-celluloose content, are very pure with an ash content < 0.1%.