Whatman offers a line of cellulose filter papers for specific applications. The product line includes filter papers for use in soil analysis and filter papers for the sugar industry.
Grade 0048
Filter mat made from a mixture of cellulose and polyester. This mat is used for optically testing baby food (artificial milk) for textile fibers.
Grade 72
Composite cellulose/glass filter loaded with activated carbon. Used to absorb radioactive iodine in air pollution monitoring and in nuclear installations.
Grade 287 ½
Kieselguhr paper with a medium to slow flow rate. Additional adsorption effect, e.g., for the separation of very fine semi-colloidal turbidity, for clarifying milk serum, starch solutions, soil suspensions or sugar-containing solutions prior to polarimetry or refractometry. Available prepleated.
Grade 551
Black colored paper with a medium to slow flow rate. Provides contrast for the detection of very fine traces of white precipitates.
Grade 2555 ½
A medium fast filter paper. Used for the filtration of the mash for the determination of the extract in malt and wort and for removing carbon dioxide from beer.
Soil analysis filter papers
Grade 0790 ½
Acid-washed paper with ash content of approximately 0.01%, low magnesium, for the determination of trace elements (Mg, Mn, Co, Cu, Mo, B).
Grade 512 ½
Low phosphate papers approximately 1.5 ppm phosphate, for the filtration of calcium lactate extracts from soil samples for the determination of K and P according to Egnér, Riehm and Lederle. Available prepleated.
Sugar/food industry filter papers
Grade 3000, 3002 and 3459
Creped or smooth filter papers, Grades 3000, 3002 and 3459, have good retentivity at a relatively high filtration speed. They are used for the clarifying filtration of:
- Dried beet pulp extracts
- Beet juice after the addition of lead acetate for subsequent polarimetric sugar determination
- Grade 3459 is specifically designed for the Venema unit (lead acetate method)
| Typical Properties - Application Specific Filters |
| Grade |
Properties |
Filtration Speed
in Herzberg (s) |
Thickness (mm) |
Weight (g/m2) |
| Soil analysis filter papers |
| 0790 ½ |
Low Mg and P |
225 |
0.17 |
84 |
| 512 ½ |
Low phosphate |
375 |
0.16 |
84 |
Sugar industry filter papers |
| 3000 |
Fast, smooth |
47.5 |
0.16 |
68 |
| 3002 |
Medium fast, smooth |
75 |
0.14 |
60 |
Specially for the venema unit |
| 3459 |
Fast, creped |
55 |
0.30 |
75 |
Malt and beer filter |
| 2555 ½ |
- |
55 |
0.17 |
75 |
Food industry mat (cellulose/polyester) |
| 0048 |
- |
- |
0.86 |
130 |
Detection of contaminants |
| 551 |
Colored black |
425 |
0.2 |
95 |
Activated carbon loaded paper |
| 72 |
- |
- |
0.80 |
195 |
Kieselguhr paper |
| 287 ½ |
- |
330 |
0.36 |
161 |