a Department of Inorganic and Analytical Chemistry, Faculty of Chemistry , University of Lodz , Lodz , Poland.
J Environ Sci Health B. 2014;49(8):550-6. doi: 10.1080/03601234.2014.911556.
The electrochemical behavior of new generation fungicide acibenzolar-s-methyl (S-methyl 1,2,3-benzothiadiazole-7-carbothioate, ASM) on the hanging mercury drop electrode (HMDE) was investigated using square wave adsorptive stripping voltammetry. This method of determination is based on the irreversible reduction of ASM at the HMDE. The well-defined ASM peak was observed at -0.4 V (vs. Ag/AgCl) in BR buffer at pH 2.2. The reduction peak current was proportional to concentration of ASM from 1.0 × 10(-8) to 6.0 × 10(-8) mol L(-1) with detection and quantification limit 3.0 × 10(-9) and 1.0 × 10(-8) mol L(-1), respectively. The applicability of the developed method for analysis of spiked samples of tap water, river water, and soil is illustrated. The effect of adsorption on the mercury electrode was studied in detail using the AC impedance method. Possible interferences with other common pesticides and heavy metal ions were examined. Clarification of the electrode mechanism was made using cyclic voltammetry (CV) technique.
新一代杀菌剂噻苯隆 - S- 甲酯（S- 甲基 1,2,3- 苯并噻二唑-7- 硫代羧酸酯，ASM）在悬汞电极（HMDE）上的电化学行为采用方波吸附溶出伏安法进行了研究。该测定方法基于 HMDE 上 ASM 的不可逆还原。在 pH 2.2 的 BR 缓冲液中，在-0.4 V（相对于 Ag/AgCl）处观察到 ASM 的明确定义的峰。还原峰电流与 ASM 的浓度成正比，从 1.0×10(-8)到 6.0×10(-8)mol L(-1)，检测限和定量限分别为 3.0×10(-9)和 1.0×10(-8)mol L(-1)。说明了该方法在分析自来水中、河水和土壤中添加样品的适用性。详细研究了吸附对汞电极的影响，采用交流阻抗法。检查了与其他常见农药和重金属离子的可能干扰。使用循环伏安法（CV）技术阐明了电极机理。
