Highly pure filter paper (approx. 0.08% ash) recommended for precise identification of materials and for sample preparation prior to sensitive detection methods.

• Made of the same super- refined cotton linters and cellulose like the quantitative filter papers.
   
• alpha-Cellulose content above 95%, therefore high stability and durability
   
• Very low content of minerals (approx. 0.08% ash)

These filter papers are perfectly qualified for food control, beverage analysis and environmental monitoring.

These filters are available as filter circles and folded filters with the following sizes as standard (in mm):

6 – 12,5 – 12,7 – 40,5 – 47 – 55 – 70 – 90 – 110 – 125 – 150 – 185 – 240 – 320 (folded filters from 70 mm).

Other sizes, sheets, rolls and special cuts are available on request.