Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Vapor pressure
Patent
1985-10-31
1987-11-17
Levy, Stewart J.
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Vapor pressure
G01N 710
Patent
active
047064951
ABSTRACT:
The invention relates to methods for the determination of the concentration of substances dissolved in a solution by means of an osmotic cell, using a pressure measurement device, and an apparatus incorporating the aforesaid osmotic cell with pressure measurement device. According to a first method, the concentrations of the substances are determined by the formation of the differences between a final pressure which is established after contact with the solution and an original and minimum pressure. According to a second method, the pressure/time course of biphasic response curves is analyzed in the vicinity of the minimum pressure, along with the rate constant for the exponential pressure increase which takes place after the minimum pressure, and the concentrations of the substances are then computed. According to a third method, simultaneous with one another, the initial slopes of the pressure/time curve of the pressure decrease in two osmotic cells are determined, and from these data, two results are determined, which are functions of the concentrations of the substances, and the concentrations of the substances are calculated from them. The reflection coefficients of both osmotic cells must thereby differ sufficiently.
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Boling Gerd
Steudle Ernst
Zillikens Josef
Kernforschungsanlage Julich Gesellschaft mit beschrankter Haftun
Levy Stewart J.
Ljungman Nils H.
Steudle Ernst
Williams Hezron E.
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