Needle filters are widely used in laboratories. They do not require membrane replacement and filter cleaning, eliminating complex and time-consuming preparation work. They are mainly used in Sample prefiltration, sterilization filtration to remove particles, liquids and gases. It is a good method for filtering small amounts of HPLC and GC samples. 0.22um sterilizing filter membrane is usually used in needle filters.
0.22um sterilizing filter membrane is a microfiltration product, mainly made of filter elements of various materials. There are also laminated filter elements for deep filtration. Currently, laminated filter elements are the main development trend. Laminated filter elements are also called membranes. The outstanding advantage of this kind of membrane filtration for sterility inspection is that it can filter a larger amount of samples and filterable substances. The filtered test sample can be inoculated into the culture medium or directly observed with a microscope. Therefore, this method has high sensitivity, more reliable results than the “direct inoculation method”, is less likely to produce false negative results, and is relatively simple to operate. However, the entire process of sterility inspection should strictly comply with aseptic operations to prevent microbial contamination, so it is mostly performed in a laminar flow clean workbench.
0.22um sterilizing filter membrane is a good filter membrane choice for needle filters. The film is biaxially stretched vertically and horizontally. It is a new material that is acid and alkali resistant and resistant to various organic solvents. It is almost insoluble in all solvents. It has wide chemical applicability and can be provided in both hydrophilic and hydrophobic categories. The pore size is 0.1μm-1μm. It has high filtration accuracy and can intercept various phages, small bacteria and particles above 0.02μm. Ptfe bubble point membrane series are widely used in air filtration, organic solvent filtration, fermentation and other fields. Interested parties can enter the store for consultation.