Method for determining content of water-insoluble substances in sodium carbonate by using microporous filter membrane
A technology of microporous membrane and soda ash, applied in the direction of removing certain components and weighing, etc., can solve the problems of lengthy, unsatisfactory, and complicated, and achieve the effect of simple and fast operation procedures, reduction of analysis time, and high accuracy.
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[0032] Below in conjunction with embodiment, further illustrate the present invention.
[0033] A method for measuring water-insoluble content in soda ash with a microporous membrane, comprising the following steps:
[0034] (1) Selection of microporous membrane
[0035] 1. Material selection: According to the material, the microporous membrane can be divided into nylon 66 (Nylon66), nylon 6 (Nylon6), polyethersulfone (PES), mixed cellulose (MCE), polypropylene (pp), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF) 7 varieties, the following are their characteristics and scope of application:
[0036] Nylon has good hydrophilicity and is suitable for most organic solutions and acid-resistant aqueous solutions.
[0037] PES hydrophilic membrane, resistant to acid, alkali and high temperature, used for terminal filtration.
[0038] MCE is not resistant to organic solutions and strong acid-base solutions, and the filter can tolerate pH values of 2-9.
[0039] ...
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