Introduction of hydrogen peroxide as an oxidant in flow injection analysis: speciation of Cr(III) and Cr(VI)

Journal article

Authors / Editors

Andersen, Jens

Research Areas

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Publication Details

Author list: Andersen JET

Publisher: Elsevier

Place: AMSTERDAM

Publication year: 1998

Journal: Analytica Chimica Acta (0003-2670)

Journal acronym: ANAL CHIM ACTA

Volume number: 361

Issue number: 1-2

Start page: 125

End page: 131

Number of pages: 7

ISSN: 0003-2670

Languages: English-Great Britain (EN-GB)

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Abstract

Hydrogen peroxide was used as an oxidant in Flow Injection Analysis (FIA). The formation of gaseous components during the analysis was suppressed by maintaining the concentration of hydrogen peroxide lower than 0/15% in 0.1 M NaOH. By this method, Cr(III) was oxidised on-line to Cr(VI) which was detected spectrophotometrically at 548 nm by complexation withe 1,5-diphenylcarbazide (DPC). Linear responses were found for concentrations

Keywords

chromium, flow-injection analysis, GFAAS, sample digestion, UV-VIS spectrophotometry

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