Aijiren not only produces HPLC Sample Vial, but also provides customers with Syringe Filter for HPLC Sample preparation. Regarding Syringe Filter, there are different material specifications, let me introduce Aijiren's Syringe Filter.
The Syringe Filter is a membrane-based disposable device used to remove particulate impurities from a small amount (≤100mL) of liquid sample. Depending on the intended end use, disposable Syringe Filter are often used in the laboratory for rapid and effective filtration, material purification, and even sterilization.
Hplc technology requires high chemical and thermal resistance to syringe filters used in this technology because samples could be exposed to high pressure and chemical solvents.The choice of membrane materials, we can briefly summarize some of the different types available: Cellulose acetate (CA),Nylon,Polyethersulphone(PES),Polypropylene (PP),Polyvinylidene fluoride (PVDF),Polytetrafluoroethylene (PTFE).
Most chromatography grade Syringe Filter are constructed of either HDPE or PP.These materials are compatible with various HPLC solvents and all provide low levels of extractables. It is reported that the chemical compatibility of HDPE and NH4OH alkaline aqueous solution is higher than PP.
About how to use Syringe Filter. First, load the sample into the syringe and securely install the filter in a twisted manner. Second, hold the assembled syringe and filter vertically to evenly wet the membrane. Then gently press the syringe plunger to push the sample through the filter. Finally replace the filter and repeat for the next sample.