Measurement of water regain and macropore volume of ion‐exchange resins

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Abstract
Various modifications of the method of centrifuging have been critically studied. The correction for interstitial water is complicated by finite angles of contact, compression of the resin bed, and slow attainment of equilibrium. The use of a non‐ionic detergent of high molecular weight has led to a procedure which eliminates errors caused by these effects, and which is convenient and rapid. It can be adapted to the measurement of the volume of macropores in macroporous resins.