Simultaneous determination of chromium(VI) and chromium(III) at trace levels by adsorptive stripping voltammetry
- 1 October 2002
- journal article
- Published by Elsevier BV in Analytica Chimica Acta
- Vol. 470 (2), 241-252
- https://doi.org/10.1016/s0003-2670(02)00757-2
Abstract
A new methodology was proposed for the speciation of chromium by differential pulse adsorptive stripping voltammetry (DPAdSV) using pyrocatechol violet (PCV) and N-(2-hydroxyethyl)ethylenediamine-N,N′,N′-triacetic acid (HEDTA) as complexing agents. In this procedure, a partial least squares (PLS) regression was used for the resolution of the strongly overlapping voltammetric signals from mixtures of Cr(III) and Cr(VI) in the presence of PCV and HEDTA. The relative error in absolute value was <6% when concentrations of several mixtures were calculated. The analysis of the possible effect of the presence of foreign ions in the solution was performed. The procedure was successfully applied to the speciation of chromium in different samples of natural water.Keywords
This publication has 32 references indexed in Scilit:
- Speciation of chromium by solid-phase extraction coupled to reversed-phase liquid chromatography with UV detectionAnalytica Chimica Acta, 1998
- Speciation of chromium using reversed phase-high performance liquid chromatography coupled to different spectrometric detection methodsSpectrochimica Acta Part B: Atomic Spectroscopy, 1997
- Catalytic‐adsorptive stripping voltammetric determination of chromium in environmental materialsElectroanalysis, 1996
- On-line separation and preconcentration of chromium species in seawaterAnalytica Chimica Acta, 1996
- The catalytic adsorptive stripping voltammetric determination of chromium with TTHA and nitrateMicrochimica Acta, 1993
- The determination of the chromium speciation in sea water using catalytic cathodic stripping voltammetryAnalytica Chimica Acta, 1992
- Determination of trace amounts of chromium(VI) in water by electrochemical methodsAnalytica Chimica Acta, 1992
- Measurement of ultratrace levels of chromium by adsorptive–catalytic stripping voltammetry in the presence of cupferronThe Analyst, 1992
- Determination of chromium(III) and chromium(VI) by ammonium pyrrolidinecarbodithioate-methyl isobutyl ketone-furnace atomic absorption spectrometryAnalytical Chemistry, 1988
- Ammonium Pyrrolidinedithio-carbamate-Methyl Isobutyl ketone-Graphite Furnace Atomic Absorption System for Some Trace Metas in Drinking WaterInternational Journal of Environmental Analytical Chemistry, 1979