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The detection and quantification of polyvinylpyrrolidone (PVP) polymer in the top skin layer of the poly(ether p‐phenylenesulfone) (PES, Victrex) ultrafiltration membrane was attempted by applying the technique of internal reflection Fourier transform infrared spectroscopy (FTIR‐IRS). The effects of the PVP concentration in the casting solution and that of the PVP molecular weight on the residual quantity of PVP were investigated in detail. The PVP content in the membrane was further correlated to the ultrafiltration performance data of PES membranes.
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Miyano et al. (1990) studied this question.
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