Ion concentration analysis and apparatus employing standard addi

Details Ion concentration analysis and apparatus employing standard addi Ion concentration analysis and apparatus employing standard addi

1986-03-21

1987-05-26

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

204401, 204402, 204416, 422 68, 436 43, 436174, G01N 2728, G01N 2746

Patent

active

046683461

ABSTRACT:
Analysis of a series of samples is carried in an electrode cell (10) containing an ion-selective electrode (11). A base solution, to which a trace of the ion to be measured has previously been added, is run into the cell (10). To perform an analysis a small volume of solution, containing a known concentration of the ion is added, followed by an identical volume of sample. The pX or mV measurement before and after each of the two additions is recorded and the analytical result calculated. After analyzing the first sample, the cell is drained, without rinsing and the second sample analyzed in the same way. No blank determination is required. In more sophisticated versions of the technique, at least two additions of standard are made, one before and one after the sample.

REFERENCES:
patent: 4151255 (1979-04-01), Capuano et al.
patent: 4236988 (1980-12-01), Suzuki et al.
patent: 4512852 (1985-04-01), Tsuboshima et al.
patent: 4600494 (1986-07-01), Bromberg et al.
Karl Cammann, "Working with Ion-Selective Electrodes", pp. 137-147 (1979).
Ullmanns Encyklopadie der Technishen Chemie, vol. 5, 4th edition, pp. 655-658, Verlag Chemie, Weinheim (1980).
Ion-Selective Electrode Methodology, vol. I, editor Arthur K. Covington, pp. 43-66 (1984).

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