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  • Ashless Filter Papers for Quantitative Analysis
  • 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-fast     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

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