Ashless grade 40 quantitative filter papers are classic, general purpose ashless filter paper with medium speed and retention. Typical applications include gravimetric analysis for numerous components in cements – clays – iron and steel products. The primary filter for separating solid matter from aqueous extracts in general soil analysis and quantitative determination of sediments in milk. They are used as a pure analytical grade clean-up filter for solutions prior to AA spectrophotometry and a high purity filter in collecting trace elements and radionuclides from the atmosphere.

Key Features

• Classic general purpose ashless filter
• Medium filtration speed and retention
• Choose from: 90mm, 110mm, 125mm, 150mm, or 185mm diameters