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Modification of catalytic adsorptive stripping voltammetric method of hexavalent chromium determination in the presence of DTPA and nitrate

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Abstract.

The voltammetric procedure for determination of traces of Cr(VI) [Anal. Chim. Acta (1992) 262:103] was modified by changing the temperature of the measurements. It was found that at the temperature of 40 °C the time of decrease of the Cr(III) signal was shortened from 30 to 5 min. As a result the total analysis time was drastically shortened. The modified procedure does not show any disadvantage as compared to the original method. The results of Cr(VI) determination by the modified procedure are less affected by Cr(III) as compared to the original method. The detection limit of the method was 2.5 × 10-11 mol L-1 (1.2 ng L-1). The validation of the modified procedure was performed by comparison of the results of analyses of tap and river water samples with those obtained using original procedure.

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Authors and Affiliations

  1. Faculty of Chemistry, Maria-Curie Skłodowska University, 20–031 , Lublin, Poland

    Małgorzata Grabarczyk & Mieczysław Korolczuk

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  1. Małgorzata Grabarczyk
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  2. Mieczysław Korolczuk
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Correspondence to Małgorzata Grabarczyk.

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Grabarczyk, M., Korolczuk, M. Modification of catalytic adsorptive stripping voltammetric method of hexavalent chromium determination in the presence of DTPA and nitrate. Anal Bioanal Chem 376, 1115–1118 (2003). https://doi.org/10.1007/s00216-003-2026-7

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  • DOI: https://doi.org/10.1007/s00216-003-2026-7

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