Deductive method for measuring ion concentration electrically

Details Deductive method for measuring ion concentration electrically Deductive method for measuring ion concentration electrically

1976-05-21

1977-01-11

Rolinec, Rudolph V.

Chemistry: physical processes

Physical processes

Crystallization

324 30R, G01N 2700, G01N 3102

Patent

active

040024288

ABSTRACT:
A deductive analytical method, using measurements of specific conductivity and pH, for determining the concentration of a desired ion in a sample which may contain multiple ionic species without removal of the ions from solution is disclosed. The method involves the steps of: measuring the specific conductivity and the pH of the sample and of a reagent; adding an excess of the reagent capable of reacting with the desired ion, e.g. causing precipitation, thereby reducing the specific conductivity of the sample; measuring the pH and specific conductivity of the sample-reagent mixture; comparing the pH and specific conductivity values of the sample, the reagent and the reaction product of the sample and reagent; and deducing the concentration of the measured ion from these values by calculation. This method permits measurement of an ionic species by a simple rapid technique which utilizes measurements on simple equipment and avoids the more complex and time-consuming operations of separation and weighing used in the prior art.

REFERENCES:
patent: 2880071 (1959-03-01), Gelman
patent: 3591481 (1971-07-01), Riseman
patent: 3880722 (1975-04-01), Beltzer

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