The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 09, 1991
Filed:
Jul. 25, 1989
Ernst Steudle, D-8581 Eckersdorf, DE;
Burkhard Stumpf, Trebgast, DE;
Other;
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.