Needle Filter (PES Membrane)

Needle filters are made of different membrane materials, and different materials are used for different purposes, the membrane suitable for sample filtration should be selected according to the experimental needs, the needle filter is connected to the syringe, and it must be tightened carefully to ensure good sealing, the needle filter is divided into two types: sterile and non-sterile, and the sterile type of needle filters must be pre-treated Before use, and the filtration system should be rinsed with water after the installation of the filter is completed, and the filter can work after clean rinsing. After washing, you can start filtering. Before inhaling the sample, it is necessary to suck about 1 ml of air into the syringe to minimize the residual liquid, the operation should be performed according to the steps to ensure the efficiency of recovery, first the sample should be inhaled into the syringe, the syringe should be inverted and all the residue on the tip should be cleaned clearly, then the sample should be filtered and injected into the tube after injection into the syringe, And finally, the filter must be removed and air must be inhaled into the syringe, the filter head must be reconnected, and all residues must be ejected. Finally, remove the filter, draw air into the syringe, reconnect the filter nozzle and push out any sample residue.