In HPLC, particulates and microbial growth in mobile phase buffers and samples can damage expensive HPLC equipment such as pumps, valves, columns and detectors. They can also lead to erratic analytical results. Pre-filtering samples and mobile phases prior to analysis can help prevent column and frit blockage, abnormally high operating pressures, and can undue wear on valve and injector seals.
Syringe filters are commonly used to pre-filter samples with volumes ranging from 1-100 mL because they can easily attach to any syringe. The sample is pushed through the syringe filter membrane which traps particulates, resulting in a contaminant and particulate free sample.
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