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

2011 ◽  
Vol 76 (8) ◽  
pp. 1033-1041
Author(s):  
Jiří Zima ◽  
Veronika Tinková ◽  
Joseph Wang ◽  
Jiří Barek
Keyword(s):  
River Water ◽  
Direct Current ◽  
Carbon Paste Electrode ◽  
Differential Pulse ◽  
Voltammetric Determination ◽  
Carbon Paste ◽  
Limit Of Determination ◽  
Optimized Conditions ◽  
Paste Electrode

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.

scholarly journals Voltammetric determination of the neonicotinoid insecticide thiamethoxam using a tricresyl phosphate-based carbon paste electrode

2010 ◽  
Vol 75 (5) ◽  
pp. 681-687 ◽  
Author(s):  
Zsigmond Papp ◽  
Valéria Guzsvány ◽  
Szymon Kubiak ◽  
Andrzej Bobrowski ◽  
Luka Bjelica
Keyword(s):  
Carbon Paste Electrode ◽  
Analytical Signal ◽  
Differential Pulse ◽  
Voltammetric Determination ◽  
Carbon Paste ◽  
Tricresyl Phosphate ◽  
Relative Standard ◽  
Neonicotinoid Insecticide ◽  
Paste Electrode

The objective of the work was to investigate the possibility of using a tricresyl phosphate-based carbon paste electrode for the direct voltammetric determination of the neonicotinoid insecticide thiamethoxam. The analyte was determined by differential pulse voltammetry in Britton-Robinson buffer pH 7.0 in the concentration range of 3.72 - 41.5 ?g mL-1. The reproducibility of the analytical signal at the 7.29 ?g mL-1 level was characterized by a relative standard deviation of 1.3 %. The applicability of the developed method was evaluated by determining thiamethoxam in a river water sample and a commercial formulation Actara 25 WG.

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