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采用高效液相色谱法研究了甲萘威在长沙、广州两地的小白菜和菜园土壤中的残留分析方法及消解动态。结果表明:采用二氯甲烷-丙酮混合溶液(体积比60∶5)提取小白菜植株中的甲萘威,弗罗里硅土柱纯化,浓缩后用反相液相色谱进行检测,方法回收率在85.11%～109.98%之间,变异系数在3.61%～9.36%之间,其在长沙、广州的小白菜植株中消解动态分别符合一级动力学方程;相关系数分别为0.8743、0.9346;半衰期分别为2.69、0.50d。菜园土壤中的甲萘威采用丙酮提取,浓缩后用反相液相色谱进行检测,方法回收率在93.68%～109.31%之间,变异系数在0.69%～3.40%之间,其在长沙、广州的菜园土壤中消解动态分别符合一级动力学方程;相关系数分别为0.9584、0.9322;半衰期分别为7.08、1.13d。
The residues of carbaryl in garden cabbage and garden soil in Changsha and Guangzhou were analyzed by high performance liquid chromatography (HPLC). The results showed that Carbaryl was extracted from the Chinese cabbage by dichloromethane - acetone mixed solution (60:5 by volume), purified by Florisil column, and concentrated by RP - HPLC. The recovery rate The coefficient of variation (CV) ranged from 3.61% to 9.36% between 85.11% and 109.98%. The digestion dynamics of Chinese cabbage plants in Changsha and Guangzhou were in accordance with the first-order kinetic equation respectively. The correlation coefficients were 0.8743 and 0.9346 respectively. The half- Is 2.69,0.50d. Carbaryl in the vegetable garden soil was extracted with acetone, and was concentrated by RP-HPLC. The recovery rates were between 93.68% and 109.31%, and the coefficients of variation were between 0.69% and 3.40% The dynamics of soil digestion in the vegetable garden accord with the first-order kinetic equation respectively. The correlation coefficients were 0.9584 and 0.9322 respectively. The half-lives were 7.08 and 1.13 d respectively.