Differential Pulse Adsorptive Stripping Voltammetric Determination of Dinoseb and Dinoterb at a Modified Electrode

• Published in: Analytical Sciences Vol. 19; no. 4; pp. 511 - 516
• Main Authors: SREEDHAR, Mallipattu, REDDY, Tukiakula Madhusudana, SIRISHA, Kami Reddy, REDDY, Srinivasulu Reddy Jayarama
• Format: Journal Article
• Language: English
• Published: Tokyo The Japan Society for Analytical Chemistry 01.04.2003; Japan Society for Analytical Chemistry; Japan Science and Technology Agency
• Subjects: 2,4-Dinitrophenol - analogs & derivatives; 2,4-Dinitrophenol - analysis; Adsorption; Analytical chemistry; Applied sciences; Chemistry; Dinitrophenols - analysis; Electrochemical methods; Electrochemistry - methods; Electrodes; Exact sciences and technology; Global environmental pollution; Hydrogen-Ion Concentration; Pesticides - analysis; Pollution; Electrode adsorption; Nitro compound; Chemical analysis; Electrochemical method; Pesticides; Carbon electrode; Electrochemical enrichment; Herbicide; Cathodic stripping voltammetry; Electrochemical storage; Environmental control; Chemical pollution; Multicomponent analysis; Environmental materials; Benzenic compound; Paste electrode; Quantitative analysis
• ISSN: 0910-6340; 1348-2246
• DOI: 10.2116/analsci.19.511

A sensitive adsorptive stripping voltammetric method for the determination of dinitrophenolic herbicides, dinoseb (DSB) and dinoterb (DTB) at a bare carbon paste electrode (CPE) and a clay modified carbon paste electrode (CMCPE) was developed. A systematic study of various experimental conditions, such as the pH, accumulation variables and composition of a modifier on the adsorptive stripping response, were examined by using differential pulse voltammetry. A significant improvement was observed in the sensitivity by using the present method with CMCPE. When CMCPE was used, a linear response was obtained over the concentration range 2 × 10-10 to 3 × 10-7 M and 6 × 10-10 to 6 × 10-7 M with lower detection limits of 1 × 10-10 M and 5.4 × 10-10 M for dinoseb and dinoterb, respectively, at an accumulation time of 100 s. The interference from other herbicides and ions on the stripping signals of both compounds was also evaluated. The described method was applied to estimate of the dinoseb and dinoterb in environmental samples.