Abstract: This invention relates to a process for the selective determination of the oncentration of a substance dissolved in a solvent by means of an osmosis cell. The osmosis cell according to the invention contains a substance not contained in the solution to be tested, which is either practically insoluble or is impermeable for the membrane. This substance reacts chemically with the substance permeating into the osmosis cell, with a product resulting from it in the cell or with a product resulting from the substance in the solution to be tested and permeating into the cell. Reaction products are thereby formed which produce a pressure in the osmosis cell, which is different from the osmotic pressure of the chemically converted portion of the substance. A pressure increase thereby occurs in the cell, from which the concentration of the substance in the solution to be tested can be determined on the basis of standard values.
Type:
Grant
Filed:
October 27, 1988
Date of Patent:
August 25, 1992
Assignee:
Kemforschungsanlage Julich Gesellschaft mit beschrankter Haftung
Inventors:
Ernst Steudle, Gerd Boling, Josef Zillikens