The equilibrium between gelatin and water vapor from 0 per cent to 100 per cent saturation has been measured by weighing the gelatin after suspending it in the vapor to constant weight. The gelatin sample was suspended on a calibrated quartz spring and placed in a closed apparatus with an aqueous solution of known vapor pressure. The rate of attainment of equilibrium was greatly increased by pumping the air from the system. The isotherms have been determined at 25 ° for untreated isoelectric gelatin, gelatin treated with thallous thiocyanate, and gelatin treated with thallous sulfate.
Proceedings of the Iowa Academy of Science
©1940 Iowa Academy of Science, Inc.
Eversole, W. G. and Fordemwalt, Fred
"The Equilibrium between Gelatin and Water Vapor at 25° C,"
Proceedings of the Iowa Academy of Science, 47(1), 189-189.
Available at: https://scholarworks.uni.edu/pias/vol47/iss1/34