Filtering products do not know how to choose? One article takes you to reveal the common problems of

Ask: Is the pore size of the filter I purchased accurate?

Answer:It must be accurate that the amperometric experimental filters have been tested for bubble point to prove the pore size and integrity of the filter membrane. The bubble point pressure is the minimum pressure required to force the bubble through a wet hole. It is inversely proportional to the size of the hole and is related to the surface tension of the liquid that wets the diaphragm. The bubble point value is calculated by calculating the bubble point.


Ask: How to choose a filter that does not interfere with the detection project?
Answer: No interference to the test items, that is, the filter material is not eluted, and the target is not adsorbed. For example, when analyzing proteins and DNA, it is recommended to choose PES or PVDF instead of nylon. The editor here also gives you some experience reference, such as nylon material for pigment , Residues of sulfonamides will be adsorbed. And because the conditions of each project are different, it is recommended to select different material filters to try to determine under chemically tolerable conditions.


Ask: What should I do if the filter membrane breaks during filtration?
Answer: The reason for the rupture of the filter membrane: first, the material cannot withstand the sample solvent being dissolved, and second, the pressure that the ultrafilter can withstand during filtration. Then the corresponding solution is to choose a filter membrane that is resistant to the sample solvent and give the appropriate pressure, especially when using a filter with a smaller diameter (refer to the corresponding COA for the pressure resistance of the filter).
 

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