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
