Because samples in high pressure liquid chromatography filtration are often exposed to high temperatures, the membrane filters used must be durable and 

Membrane Solutions Syringe Filter PTFE Membrane 100 PCs, 0.22um Pore Size 13mm Disc Diameter, HPLC and GC Needle Filter, Non Sterile, Hydrophobic, 

High performance sterile and nonsterile syringe filters offered in a variety of membrane materials and pore sizes, tailored for sample preparation for HPLC, 

Choose from a variety of membrane types and pore sizes to prepare small-volume samples for High-Performance Liquid Chromatography (HPLC) and ion chromatography.

This short animation explains how your syringe filter might be putting your HPLC at risk. Some syringe filters exhibit unpredictable loss of membrane 

The chemistry and volume of the liquid or gas to be filtered; The filter media/membrane to be used; The desired pore size or type of particle to be captured.

Hydrophilic Nylon is ideal for aqueous (non-acidic) or organic sample prep and HPLC, GC or dissolution sample analysis. With its excellent flow characteristics, 

Custom Syringe Filter Development. Purilogics' development team utilizes ultrasonic welding to generate syringe filters for a variety of uses.