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Potentiometric stripping determination of mercury(II), selenium(IV), copper(II) and lead(II) at a gold film electrode in water samples

✍ Scribed by Eduardo Pinilla Gil; Peter Ostapczuk

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 1014 KB
Volume: 293
Category: Article
ISSN: 0003-2670
DOI: 10.1016/0003-2670(94)00075-1

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✦ Synopsis

A potentiometric stripping method for the determination of Se(IV), I-I&I) at the ng 1-l level, which also permits the simultaneous determination of C&I) and PbCII) has been developed. Anodic stripping by an oxidative constant current follows the reductive deposition of the elements in atomic form at a gold fihn working electrode. The performance of the method has been checked on a certified reference water sample. The method was adapted to operate on river water samples, and the results of the determination of mercury at low ng I-' level in sea water are also reported. Typical interferences that can occur in water samples are discussed.

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