Abstract
Differential pulse stripping voltammetry was applied in the determination of mercury in urine samples. The mercury in the samples was oxidized to Hg(II) using bromine and KMnO4. Hg(II) was reduced by NaBH4to the metallic state and volatilized using nitrogen as the carrier gas. The gas containing mercury vapor was dried and accumulated on a gold plated impregnated graphite electrode. The stripping process was performed from 0.1MHClO4+ 3 × 10−3MHCl solution. The calibration graph was linear from 1 to 10 μg L−1of mercury in urine sample. The relative standard deviation for 8 μg L−1of mercury was 6.6%. The detection limit was 0.4 μg L−1of mercury.
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