Author： Batalova V. N. Zakharova E. A. Slepchenko G. B. Malygina M. V.
Publisher： MAIK Nauka/Interperiodica
ISSN： 1061-9348
Source： Journal of Analytical Chemistry, Vol.59, Iss.5, 2004-05, pp. : 468-473
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Abstract
The main problems with the determination of mercury in foodstuffs by stripping voltammetry were analyzed. The conditions for obtaining the analytical signal from mercury(II) at a gold–graphite electrode and for reducing the effect of interfering substances were refined. A simplified procedure for the preparation of foodstuff samples by the chemical (HNO3 + H2O2) and photochemical oxidation of samples was proposed. The determination conditions were optimized by the fractional factorial design of the experiments. It was shown that a gas-discharge XeBr excilamp can be used as an alternative to a mercury quartz lamp in the sample preparation of foodstuffs. The conditions for reducing the blank experiment and its contribution to the results of determination were considered.
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