Analysis of lead and zinc by mercury-free potentiometric stripping analysis

Journal article

Authors/Editors

Andersen, Jens

Research Areas

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Publication Details

Author list: Andersen JET

Publisher: Taylor and Francis Group

Place: NEW YORK

Publication year: 1997

Journal: Analytical Letters (0003-2719)

Journal acronym: ANAL LETT

Volume number: 30

Issue number: 5

Start page: 1001

End page: 1012

Number of pages: 12

ISSN: 0003-2719

eISSN: 1532-236X

Languages: English-Great Britain (EN-GB)

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Abstract

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 of the glassy-carbon electrode. The activation is performed by preconcentrating 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 range 0-2000 ppb.

Keywords

electrochemistry, potentiometric stripping analysis, trace-metal analysis

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