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A simple voltammetric procedure for speciation and evaluation of As removal from water

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Abstract

Here, we show a fast and sensitive method for the determination of inorganic arsenic in natural waters using differential pulse cathodic stripping voltammetry. All the arsenite determinations were done in 2.0 mol L−1 HCl + 3.15 × 10−4 mol L−1 Cu(II) supporting electrolyte. 1 × 10−3 mol L−1 sodium thiosulphate was used as As(V) reducing agent. The detection limit was 0.5 μg L−1 for both species. The method has been applied to water samples collected in an arsenic-contaminated region of Brazil, in particular, to verify the efficiency of the solar oxidation and removal of arsenic process applied to these waters.

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Acknowledgments

The authors would like to acknowledge CNPq for a Ph.D. thesis grant (CNPq No141305/2001−0), and Dr. Carol H. Collins for English revision.

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Authors and Affiliations

  1. Instituto de Química, Universidade Estadual de Campinas (Unicamp), P.O. Box 6154, 13084-971, Campinas, SP, Brazil

    Maria do Socorro S. Pereira, Eduardo Winter, Susanne Rath & Anne Hélène Fostier

  2. Faculdade de Engenharia Civil, Arquitetura e Urbanismo, Universidade Estadual de Campinas (Unicamp), P.O. Box 6021, 13084-871, Campinas, SP, Brazil

    Jose Roberto Guimarães

Authors
  1. Maria do Socorro S. Pereira
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  2. Eduardo Winter
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  3. Jose Roberto Guimarães
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  4. Susanne Rath
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  5. Anne Hélène Fostier
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Correspondence to Anne Hélène Fostier.

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Pereira, M.d.S.S., Winter, E., Guimarães, J.R. et al. A simple voltammetric procedure for speciation and evaluation of As removal from water. Environ Chem Lett 5, 137–141 (2007). https://doi.org/10.1007/s10311-007-0094-1

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  • DOI: https://doi.org/10.1007/s10311-007-0094-1

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