Sample diluent for measurement with ion-selective electrodes and

Details Sample diluent for measurement with ion-selective electrodes and Sample diluent for measurement with ion-selective electrodes and

1991-07-30

1993-07-20

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204418, 204419, 204433, 204435, 20415321, G01N 2726

Patent

active

052289737

ABSTRACT:
A body fluid sample is diluted with a diluent which comprises an aqueous solution containing bis(2-hydroxyethyl)-iminotris(hydroxymethyl)methane and boric acid to obtain a diluted body fluid sample, and the ion concentration in the diluted body fluid sample is determined with ion-selective electrodes, whereby the variation width of pH in the diluted body fluid sample can be held down to a narrow range. As a result the determination can be made without exerting adverse effects on the ion-selective electrodes, and errors in determination can be markedly reduced as compared with cases where the conventional diluents are used.

REFERENCES:
patent: 4409088 (1983-10-01), Kanno et al.
patent: 4619739 (1986-10-01), Kanno et al.

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