The 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; 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 spectrophotometry. Used also as a high purity filter in the collection of trace elements and radionuclides from the atmosphere. Retention: 8µm. Diameter: 12.5cm. 100/Pack. Whatman™ #: 1440-125.