Filter Circles, Quantitative, Grade 40
Grade 40: 8 μm. General purpose ashless filter paper with medium speed and retention. For gravimetric analysis of numerous components in cements, clays, iron and steel products, as a primary filter for separating solid matter from aqueous extracts in general soil analysis, quantitative determination of sediments in milk and as a pure analytical grade clean-up filter for solutions prior to AA spectrometry. Also as a high-purity filter in the collection of trace elements and radionuclides from the atmosphere.
- Properties: medium.
- Ash content: 0.007 %.
- Thickness: 210 μm.
- Weight: 95 g / m2.
- Filtration time acc. to Herzberg: 340 s.