Dry thin collodion membranes have been prepared which are permeable to water, ammonia, weak acids of low molecular weight, HCl gas, O2, CO2, and H2S, but are impermeable to strong electrolytes and substances of high molecular weight. The permeability to gases does not depend on the density, so that the gases do not pass through pores in the membrane.
Article| January 20 1928
THE PERMEABILITY OF THIN DRY COLLODION MEMBRANES
John H. Northrop
From the Laboratories of The Rockefeller Institute for Medical Research, Princeton, N. J.
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John H. Northrop; THE PERMEABILITY OF THIN DRY COLLODION MEMBRANES . J Gen Physiol 20 January 1928; 11 (3): 233–237. doi: https://doi.org/10.1085/jgp.11.3.233
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