Analysis of Lead and Zinc by Mercury-Free Potentiometric Stripping Analysis

Jens Enevold Thaulov Andersen

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    A method is presented for trace-element analysis of lead and zinc by potentiometric stripping analysis (PSA) where both the glassy-carbon working electrode and the electrolyte are free of mercury. Analysis of zinc requires an activation procedure of the glassy-carbon electrode. The activation is performed by pre-concentrating zinc on glassy carbon at -1400 mV(SCE) in a mercury-free electrolyte containing 0.1 M HCl and 2 ppm Zn2+, followed by stripping at approx. -1050 mV. A linear relationship between stripping peak areas, recorded in the derivative mode, and concentration was found in the concentration range 0-2000 ppb.
    Original languageEnglish
    JournalAnalytical letters
    Issue number5
    Pages (from-to)1001-1012
    Publication statusPublished - 1997


    • Trace-metal analysis
    • Potentiometric stripping analysis
    • Electrochemistry

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