Vacuum filtration devices are mainly used for liquid chromatography mobile phase filtration, particle matter analysis, and microbial contamination detection. They are regular equipment in chemical laboratories. Using borate glass or 316L sanitary grade stainless steel as materials, it can filter various aqueous solutions, organic matter, and corrosive liquids in analysis, and can be subjected to 121 ℃ hot pressing disinfection treatment.
Basic operational knowledge
1. Solvent filters are fragile items and should not be moved as a whole, especially with clamps
2. The selection of filter membrane should choose qualified products. Unqualified ones will dissolve impurities. The solvent to be filtered can be soaked for 24 hours to see if there is any dissolution phenomenon, in order to examine the quality of the filter membrane
3. Filter membranes are divided into organic and aqueous types, and should be distinguished.
4. For water filtration, organic membranes are used for organic filtration. After filtration, the mixture is mixed, and the ratio of the mixed mobile phase is determined by which membrane is used.
5. The membrane doesn't separate, but the smooth surface upwards and the coarse surface downwards will have better filtration effect.
6. Do not dispose of discarded filter membranes casually, as they can pollute the environment and are not suitable for degradation. Collect and handle uniformly.
7. When the oil-free vacuum pump that comes with the solvent filter is used for pumping, do not wait until the liquid is empty before pulling out the hose. It is not advisable to do so as it may flatten the hose and stop the pump when there is still some liquid left.
8. The filtered solvent should avoid secondary pollution.