Collect. Czech. Chem. Commun. 2011, 76, 1033-1041
Published online 2011-07-20 16:02:08

Voltammetric determination of 1,2-diaminoanthraquinone using carbon paste electrode

Jiří Zimaa,*, Veronika Tinkováa, Joseph Wangb and Jiří Bareka

a Charles University in Prague, Faculty of Science, Department of Analytical Chemistry, UNESCO Laboratory of Environmental Electrochemistry, Albertov 6, 12843 Prague 2, Czech Republic
b University of California, Department of Nanoengineering, San Diego, La Jolla, CA 92093 USA


Direct current (DC) voltammetry and differential pulse (DP) voltammetry using a carbon paste electrode (CPE) have been used for the determination of trace amounts of ecotoxic 1,2-diaminoanthraquinone (DAAQ). The limit of determination (LD) of DAAQ for DC voltammetry was 2 × 10–6 mol l–1, and for DP voltammetry 2 × 10–7 mol l–1 under the optimized conditions in a mixed Britton–Robinson buffer pH 12 and methanol (1:9) medium. Adsorptive accummulation of the analyte on the surface of CPE decreased the limit of determination to 2 × 10–8 mol l–1 for DP voltammetry. Practical applicability of these newly developed methods was verified on model samples of river water.

Keywords: Analytical methods; Electrochemistry; Voltammetry; Carbon paste electrode; 1,2-Diaminoanthraquinone; Differential pulse voltammetry; Direct current voltammetry; Adsorptive stripping voltammetry.

References: 24 live references.