Membrane osmometer

Details Membrane osmometer Membrane osmometer

1982-02-18

1984-06-26

Swisher, S. Clement

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Vapor pressure

277117, 277110, G01N 1304

Patent

active

044558643

ABSTRACT:
This invention is directed to a membrane osmometer for direct measurement of osmotic pressures comprising a pressure measuring chamber for receiving pure solvent, a sample chamber separated therefrom for receiving solution to be tested, and a semi-permeable membrane contacting a support plate coarsely pervious to liquids, the membrane being located on the side of the support plate adjacent to the sample chamber, wherein the sample chamber comprises, on its surface nearest the membrane, a conical annular surface which, when the sample chamber and pressure measuring chamber are assembled, presses an elastic sealing ring against both the surface of the membrane facing the sample chamber and against an inner surface of the pressure measuring chamber.

REFERENCES:
patent: 2755111 (1956-07-01), Newell et al.
patent: 3518875 (1970-07-01), Charmasson
patent: 3590634 (1971-07-01), Pasternak et al.
patent: 3635075 (1972-01-01), Gilbert
patent: 4006639 (1977-02-01), Wetterhorn
patent: 4137756 (1979-02-01), Cossack et al.
patent: 4170895 (1979-10-01), Kilger
"A Foil Swelling Pressure Osmometer", Bertil Eroksson, Chemical Scripts (1971) I, No. 5, pp. 221-226.

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