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

  • Acid-washed and rinsed with water to neutralise it
  • Free of minerals and metallic ions,hence ideal for the detection of metallic ions

Specification:

Grade Sample Speed Retention rate* [µm] Filtration Herzberg (s) Thickness (mm) Weight [g/m²]
B58940 Fine crystalline precipitates Medium  2-4 450 0.17 84
B58941 Coarse and gelatinous precipitates Fast 12-25 50 0.19 79
B58942 Very fine crystalline precipitates Slow lt;2 750** 0.16 84
B58943 Coarse precipitates Medium Fast 4-12 140 0.18 85
B58944 Fine crystalline precipitates Slow thin 2 900 0.15 74

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