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Issue 6, 2003
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The determination of trace metals in estuarine and coastal waters using a voltammetric in situ profiling system

Kate A. Howell,a  Eric P. Achterberg,*a  Charlotte B. Braungardt,a  Alan D. Tappin,a  David R. Turnerb  and  Paul J. Worsfolda 
Author affiliations

* Corresponding authors

a School of Environmental Sciences, Plymouth Environmental Research Centre, University of Plymouth, Plymouth, UK
E-mail: Eachterberg@Plymouth.ac.uk
Fax: +44-1752-233035
Tel: +44-1752-233036

b Department of Analytical and Marine Chemistry, University of Göteborg, Sweden

Abstract

This work presents the optimisation, validation and field deployment of a voltammetric in situ profiling (VIP) system for the simultaneous determinations of dynamic Cd(II), Cu(II) and Pb(II) in estuarine and coastal waters. Systematic studies in NaNO3 (as a supporting electrolyte) and seawater, indicated that variations in ionic strength, pH and dissolved oxygen did not affect the response of the instrument, whereas an Arrhenius type temperature response was observed. The VIP instrument allows the determination of 2–3 samples h−1, and has a detection limit (defined as 3σ) in seawater for Cd(II): 23 pM, Cu(II): 1.13 nM, and Pb(II): 23 pM. The VIP system accurately measured the total dissolved concentrations of Cd(II), Cu(II) and Pb(II) in two certified reference materials; SLRS-3, a river water, and SLEW-2, an estuarine water. Field evaluation of the instrumentation and analytical methods was achieved through a series of surveys in the Plym Estuary (Devon, UK), from which environmental data are presented.

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Publication details

The article was received on 20 Jan 2003, accepted on 25 Apr 2003 and first published on 14 May 2003


Article type: Paper
DOI: 10.1039/B300712J
Citation: Analyst, 2003,128, 734-741
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    The determination of trace metals in estuarine and coastal waters using a voltammetric in situ profiling system

    K. A. Howell, E. P. Achterberg, C. B. Braungardt, A. D. Tappin, D. R. Turner and P. J. Worsfold, Analyst, 2003, 128, 734
    DOI: 10.1039/B300712J

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