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|標題:||Elimination of the copper-zinc interference at mercury film electrodes by a Nafion/clay modified||作者:||Zen, J.M.
|關鍵字:||Zn2+;stripping;mercury electrode;Cu2+;clay;Nafion;anodic-stripping voltammetry;clay-modified electrodes;intermetallic;compound formation;glassy-carbon electrodes;montmorillonite films;cadmium;lead;charge||Project:||Electroanalysis||期刊/報告no：:||Electroanalysis, Volume 13, Issue 6, Page(s) 505-508.||摘要:||
The construction of a Nafion/clay-modified mercury electrode was shown to successfully eliminate the interference of Cu2+ in the stripping determination of Zn2+. The modified electrode discriminated towards deposition of Cu2+ during the electrolytic deposition of Zn2+ thus it avoided the formation of the intermetallic compounds at mercury. Square-wave stripping peak currents after 1 min of electrolysis at -1.2 V revealed that the Zn-stripping signal obtained with the modified electrode was linear over two ranges of 0-5 and 6-12 muM for Zn2+ in the presence of 10 muM Cu2+. The modification procedure is reproducible and the resulting attachment is stable. The analytical utility is illustrated by the measurement of Zn2+ in real water samples.
|Appears in Collections:||化學系所|
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