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Whatman chromatography paper media are made from specially selected cotton cellulose. They are rigorously quality controlled for characteristics important to the chromatographer and to ensure uniformity within the grade. The chromatography paper product line includes standard cellulose and ion exchange grades.
1 Chr: A smooth surface 0.16mm thick with a linear flow rate (water) of 130mm/30min. Good resolution for general analytical separations.
2 Chr: Thickness 0.18mm. Flow rate 115mm/30 min. Slower than 1 Chr for higher resolution applications. Smooth surface. Particularly recommended for optical or radiometric scanning.
3 Chr: A medium thickness paper (0.36mm) with a flow rate of 130mm/30 min. For general applications with medium/heavy solute loadings. Frequently used for separation of inorganic compounds and for electrophoresis
3MM Chr: Though widely used as a blotting paper, 3MM Chr is also used both in electrophoresis and for general chemistry. A medium thickness paper (0.34mm) used extensively for general chromatography and electrophoresis. Flow rate is 130mm/30 min.
4 Chr: Thickness 0.21mm. Flow rate 180mm/30 min. Fastest of the thin papers. Recommended for routine and/or repetitive chromatography when loadings are relatively low. Smooth surface. Very suitable where speed is important and very high resolution is not required.
17 Chr: A thick (0.92mm) and highly absorbent paper with a very high flow rate of 190mm/30 min. Suitable for the heaviest loadings and ideal for preparative paper chromatography and electrophoresis.
31ET Chr: Thickness 0.50mm. Flow rate 225mm/30 min. Extremely fast. Flow rate is the highest of all chromatography papers in the Whatman range. Thick paper with fairly soft surface. Principal application is in electrophoresis of large molecules.
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