Polypropylene hydrophobic filters have extremely low extractable levels. Designed to provide accurate, consistent analysis results for sensitive ion chromatography applications whilst prolonging column life. The Polypropylene filter is the preferred filter membrane for HPLC applications where the detection levels are below 230nm. Its pH range is 1 to 14 and it has a broad chemical compatibility allowing its use with aqueous and organic solvent samples. It represents an alternative to Teflon (PTFE) membranes in most cases.