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Application of Cold Vapor Differential Pulse Voltammetric Method for Determination of Mercury in Urine Samples

✍ Scribed by Mieczysław Korolczuk

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
56 KB
Volume
57
Category
Article
ISSN
0026-265X

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✦ Synopsis

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 KMnO 4 . Hg(II) was reduced by NaBH 4 to 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 0.1 M HClO 4 / 3 1 10 03 M HCl solution. The calibration graph was linear from 1 to 10 mg L 01 of mercury in urine sample. The relative standard deviation for 8 mg L 01 of mercury was 6.6%. The detection limit was 0.4 mg L 01 of mercury.

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