Quantitative filter paper circles, Whatman Grade 40
High-purity ashless filter paper made from pure cellulose for general-purpose quantitative analysis with medium flow rate. Grade 40 quantitative filter papers are well suited for soil analysis, determination of milk sediment, clean-up filter prior to atomic absorption spectroscopy, analysis of cements, clays, iron, and steel products, or collection of trace elements and radionucleides from the atmosphere.
Specifications:
- Surface: Smooth
- Particle retention in liquid: 8 µm (98 %)
- Filtration speed: 340 s
- Thickness: 0,210 mm
- Basis weight: 95 g/m2
- Ash content: 0,007 %
