Differential pulse adsorptive stripping voltammetric determination of dinoseb and dinoterb at a modified electrode
| Autor: | Kami Reddy Sirisha, Srinivasulu Reddy Jayarama Reddy, Mallipattu Sreedhar, Tukiakula Madhusudana Reddy |
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| Rok vydání: | 2003 |
| Předmět: |
Detection limit
Stripping (chemistry) Chemistry Analytical chemistry Dinoterb Hydrogen-Ion Concentration Analytical Chemistry Carbon paste electrode chemistry.chemical_compound Electrode Dinoseb Cathodic stripping voltammetry Electrochemistry Differential pulse voltammetry Adsorption Pesticides 2 4-Dinitrophenol Electrodes Dinitrophenols |
| Zdroj: | Analytical sciences : the international journal of the Japan Society for Analytical Chemistry. 19(4) |
| ISSN: | 0910-6340 |
| Popis: | 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 x 10(-10) to 3 x 10(-7) M and 6 x 10(-10) to 6 x 10(-7) M with lower detection limits of 1 x 10(-10) M and 5.4 x 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. |
| Databáze: | OpenAIRE |
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