Analysis of Lead in Blood Serum Samples by Voltammetry Method
نویسنده
چکیده
In this article a novel, sensitive and selective cathodic adsorptive stripping procedure is reported for determining of lead. The method is based on adsorptive accumulation of PbN-Nitrozo-N-Phenylhydroxylamine on a hanging mercury drop electrode, followed by the reduction of adsorbed specie by voltammetric scan while followed differential pulse modulation. The optimum conditions for analysis of lead include pH, 7.0, (borate buffer), 9.0×10 M N-Nitrozo-N-Phenylhydroxylamine, accumulation potential of -0.1 V, (versus Ag/AgCl). The 4 peak current is proportional to the concentration of lead over the entire concentration range tested (0.7-175 ng/ml) with a low detection limit of 0.1 ng/ml for an accumulation time of 150 s. The method was applied to determination of lead in blood serum samples with satisfactory results.
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