Automatic kinetic determination of Hg(II) by anodic stripping potentiometry with constant current oxidation.
A new kinetic method for the determination of Hg(II) is proposed. It is based on the kinetic evolution of the anodic stripping potentiometric curves yielded by a gold electrode previously coated with mercury upon passage of constant electrical currents. The method features a linear determination range between 40 and 800 ppb of Hg(II) and a relative standard deviation of 5% (n = 9) for a mercury concentration of 200 ppb. The experiments were conducted on a customized automatic set-up, and instrumentation, data acquisition and processing were all governed by means of a QBASIC program (PSAKINEL) written by the authors.
Cladera
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A
Department of Chemistry, Faculty of Sciences, University of the Balearic Islands, E-07071 Palma de Mallorca, Spain.
Estela
J M
JM
Cerdá
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