Voltammetric method of measuring

Details Voltammetric method of measuring Voltammetric method of measuring

1987-05-13

1988-11-22

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

204402, 204434, G01N 2746

Patent

active

047863730

ABSTRACT:
A stripping analysis method comprises a preelectrolysis step during which liquid to be analyzed is introduced into a measurement cell at a pulsating rate, a working electrode is vibrated at an ultrasonic frequency, and the voltage potential between the working electrode and a reference electrode is adjusted to a level which allows the substances to be determined to be deposited on the working electrode. After the preelectrolysis step is a stripping step during which the voltage potential between the working electrode and the reference electrode is scanned through the potential range where the substances to be determined are dissolved back to the liquid and current is measured while the liquid in the measurement cell remains essentially undisturbed. The method also comprises an elimination step during which the voltage potential between the working electrode and the reference electrode is adjusted to a level at which the working electrode is regenerated. The products of the measurement step are removed from the cell by vibrating the working electrode at an ultrasonic frequency and thereby disturbing the liquid in the cell, and introducing liquid into the cell at a non-pulsating rate and thereby displacing liquid from the cell.

REFERENCES:
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patent: 4172770 (1979-10-01), Semersky et al.
patent: 4216671 (1980-08-01), Kurland
Bard et al., "Electrochemical Methods", John-Wiley & Son, 1980, pp. 136-141.

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