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What Is Syringe Filter
Nov 19, 2017

   Syringe filter is a single-use filter cartridge. It is attached to the end of a syringe for use. Syringe filters may have Luer lock fittings, though not universally so. A syringe filter generally consists of a plastic housing made of polypropylene with a membrane which serves as a filter. The fluid to be purified may be cleaned by drawing it up the syringe through the filter, or by forcing the filtered fluid out, through the filter.

In scientific applications, the most common sizes available are 0.2 or 0.22 µm and 0.45 µm pores. These sizes are sufficient for HPLC use. The smallest known sterile syringe microfilter have pore sizes of 0.02 µm. The filter membrane may be of PTFE, nylon, PES,MCE,PVDF,CA,RC, or other treated products for specific purposes.

Application

Syringe filters may be used to remove particles from a sample, prior to analysis by HPLC. Particles easily damage an HPLC due to the narrow bore and high pressures within. Being relatively affordable, they may be used for general purpose filtration, especially of smaller volumes where losses by soaking up filter paper are significant. Syringe filters are also available for the filtration of gases, and for the removal of bacteria from a sample.


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