Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Vapor pressure
Patent
1989-07-25
1991-04-09
Williams, Hezron E.
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Vapor pressure
G01N 1304
Patent
active
050054031
ABSTRACT:
In a process for the determination of the concentration of a substance dissolved in a solvent by means of an osmometer, comprising a two-chamber system with a first chamber having an osmosis cell and a second chamber for the measurement solution, to shorten the measurement time and to improve the separation of permeating components during the measurement of the concentration of the substances in the measurement solution, the pressure in the osmosis cell is held constant with an incompressible membrane arrangement, whereby with a pressure measurement apparatus in the second chamber after the replacement of a solvent, a reference solution or a calibration solution by a measurement solution, a pressure curve which corresponds to the concentrations of the nonpermeating substance and permeating substances or to the flows of the permeating substances between the osmosis cell and the second chamber is measured, and by analysis of the curve, the concentration of the nonpermeating and permeating substances in the measurement solution is determined. In one embodiment, the volume of the chamber containing the osmotic cell is varied in response to the pressure vs. time curve so as to maintain the volume flow of solvent through the membrane at substantially zero.
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Steudle Ernst
Stumpf Burkhard
Steudle Ernst
Williams Hezron E.
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