Syringe Filters

Syringe Filters

Syringe filters are fast, convenient, and reliable tools commonly used in laboratories. Featuring a sleek, lightweight design and high cleanliness standards, they are primarily used for sample pre-filtration, the removal of solid particles, and the sterile filtration of liquids and gases. Ideal for filtering small-volume laboratory samples, they exhibit minimal sample adsorption, thereby ensuring maximum recovery of precious or limited-quantity samples. The housings are made of polypropylene and ultrasonically welded; being adhesive-free, they prevent sample contamination.

Syringe filters have a wide range of applications, including sample preparation for liquid and gas chromatography, environmental testing, routine quality control, removal of protein precipitates, dissolution testing, and more. Being disposable, they offer speed and high efficiency. However, a major concern with disposable labware is contamination; it is crucial to keep packages sealed during storage and to ensure that gloves and tools are clean when handling the filters, as cross-contamination is particularly difficult to resolve or manage.
Do not apply excessive force during use, as this could rupture the filter membrane and compromise its filtration performance. Certain complex sample solutions—particularly those containing residual fats or high-molecular-weight proteins, or those that are emulsified—can be difficult to process; they may clog the membrane and halt filtration. In such cases, do not persist in forcing the liquid through; instead, switch to a fresh filter. Your objective is to obtain a clear sample solution free of suspended matter—whether by preventing emulsification or by adding sodium chloride to break an emulsion.
Carefully select the appropriate filter membrane: use organic-compatible membranes for organic-phase sample solutions and aqueous-compatible membranes for aqueous-phase solutions. Check the markings on the membrane packaging to ensure the correct type is chosen. For samples containing a 1:1 mixture of aqueous and organic phases, filter the sample through both types of membranes to strictly prevent the introduction of any impurities.
When a pigmented sample solution was passed through a filter membrane, the membrane turned red; subsequent analysis revealed a complete loss of Erythrosine, indicating that the membrane had adsorbed the dye. Therefore, when using syringe filters for pigmented solvents, it is essential to conduct validation tests to select a membrane that does not adsorb the pigments.

Any inquiry for syringe filters, contact Quzhou Lab Technology for a quote!

Precautions for Using Syringe Filters