Pervaporation versus Evaporation
Quote: In the course of some experiments on dialyzation, my assistant, Mr. C. W. Eberlein, called my attention to the fact that a liquid in a collodion bag, which was suspended in the air, evaporated, although the bag was tightly closed. This is the original observation reported by Kober in 1917 (Chap. 8, Ref. ). Collodion is cellulose nitrate, permeable to water (Sect. 7.1). A parallel to the loss of water through packaging film or, for that matter, contact lenses comes to mind.
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