Abstract
Stripping voltammetry with collection at a rotating ring—disk electrode having a platinum ring and a glassy-carbon disk was used for the determination of Hg(II) in 1·0 M H 2SO 4 medium in the range 0·10–4·00 ppM. Satisfactory results were obtained only after a thin film of Au (two monolayer equivalents) was electroplated on the disk electrode. The average relative deviation of the results for determination at the 0·10-ppM level was 7·5 %. The limit of detection for the technique is approximately 0·01 ppM.
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