Chromatography papers are made from pure linters with an α-cellulose content >98%. They are of the highest purity with a good resistance and outstanding quality. Their surface is smooth (grade 2043a is particularly smooth).

Owing to the manufacturing process, all chromatography papers have their fibers oriented in one direction. The absorption capacity of the sheet is always slightly greater along the fibers than at right angles to them. In order to obtain reproducible measurements work should always be carried out in the direction of the fibers. This is indicated by the 600 mm long edge of the sheet. In smaller cuts the fiber direction can be determined by placing a drop of water on the sheet. The elliptical water spot will have its greatest diameter in the direction of the fibers.

Sub-grades ”b“ are thicker than the ”a“ grades and are more suitable for higher volumes and two-dimensional separations.

Applications

Analytical work

• For most chromatographic work, Grade 2043 a, 2043 b

• For descending work for long migratory distances and widely differing R_f values., Grade 2040 a, 2040 b

• Circular and horizontal chromatography, Grade 2045 a, 2045 b

• Evaluation by elution, Grade 2043 b

• With very high wet strength, Grade 3469

Preparative work

• Working with large amounts of substances, Grade 2316

• Separation of relatively large molecules by electrophoresis, Grade 2668

• Separation of very large amounts of substances, Grade 2727