Filter paper, qualitative

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Compatible with Hirsch or Büchner funnels, average thickness 115 µm. Acid-treated for high wet-strength and chemical resistance.

• Nominal particle retention of 2.7 µm
• Slow flow rates (Herzberg filtration speed 2685 s)
• High purity and low ash content (0.015 % ash maximum)

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Recommended for chromatographic analysis and preparations.

• Made from pure linters with an α-cellulose content of > 98%
• High-performance resolution and wet strength
• The fibres are oriented in predominantly one direction
• Thicker papers allow higher sample volumes
• Lower capillary rises offer higher resolutions

Recommended for the seperation of very fine semi-colloidal turbidities.

• Weight 196 g/m²
• High adsorption rate
• Minimum content of activated carbon 35 %
• Filtration speed acc. to Herzberg 360 s
• Thickness 0.52 mm

Fast, 12 to 25µm

• wet-strength
• time saving, because folded filters have a larger surface area than circular filters of the same diameter
• Weight: 88g/m²
• Thickness: 0.17mm

Slow 2 to 4µm

• for fine precipitates
• Weight: 75g/m²
• Thickness: 0.15mm

Medium to fast, 8 to 10µm

• thick filter paper
• for fast filtration of coarse precipitates
• Weight: 140g/m²

Slow < 2 µm

• thick filter paper
• for fine precipitates
• Weight: 85 g/m²
• Thickness: 0.15 mm

Recommended for the detection of very fine traces of light-coloured particles and precipitates.

• Made of pure celluloses and with constriction of black additives
• White and light-coloured particles can be detected easily by the strong contrast to the black filter paper
• Weight 95 g/m²
• Thickness 0,2 mm
• Filtration speed acc. to Herzberg 850 s