Ashless Filter Papers for Quantitative Analysis

Ashless filters (ash content approx. 0.004%), recommended for quantitative analysis, routine gravimetric tests and sample preparation for instrumental analysis.

Made of super- refined cotton linters and cellulose alpha-Cellulose content above 95%, therefore high stability and durability

Acid-washed and therefore free of minerals and metallic ions, ideal for the detection of metallic ions

For analytical applications, routine quantitative and /or gravimetric procedures

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

These filters are available as filter circles with the following sizes as standard (in mm): 12,5 – 12,7 – 40,5 – 47 – 55 – 70 – 90 – 110 – 125 – 150 – 185 – 240 – 320. 

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

Technical Data

Grade         Properties Filtration Herzberg [s] Retention rate* [μm] Weight [gsm] Thickness[mm]

589/1 – black fast                                   50                                 12 – 25                         79                 0,19

589/2 – white medium fast                 140                                   4 – 12                         85                 0,18

589/4 – yellow medium fast, Low-fat 170                                    4 – 7                         81                 0,17

589/5 – red medium fast                 450                                    2 – 4                         84                 0,17

589/6 – green slow, thinn                 900                                       2                         74                 0,15

589/3 – blue slow                                 750 **                            < 2                         84                 0,16

* Approximate values ** Measured with 100 mm water column instead of 50mm