Determination of mercury traces by differential-pulse stripping voltammetry after sorption of mercury vapour on a gold-plated electrode

Trace mercury is reduced with tin(II) to mercury metal, which is volatilised by bubbling air through the solution. A certain fraction of this mercury is sorbed on a rotating gold disk electrode and stripped in a thiocyanate solution. The detection limit is about 30 ng Hg(II) in solution; the relativ...

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Veröffentlicht in:Analytica chimica acta 1987, Vol.199, p.167-171
Hauptverfasser: Scholz, Fritz, Nitschke, Lutz, Henrion, Günter
Format: Artikel
Sprache:eng
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Zusammenfassung:Trace mercury is reduced with tin(II) to mercury metal, which is volatilised by bubbling air through the solution. A certain fraction of this mercury is sorbed on a rotating gold disk electrode and stripped in a thiocyanate solution. The detection limit is about 30 ng Hg(II) in solution; the relative standard deviation is 6% for 100 ng Hg(II) ( n = 7). The detection limit for mercury in air is 1.7 ng l −1 with a preconcentration time of 10 min.
ISSN:0003-2670
1873-4324
DOI:10.1016/S0003-2670(00)82809-3