6%甲萘威·四聚乙醛在小白菜及土壤中残留分析方法及消解动态  

Residue Analysis and Degradation Dynamics of Carbaryl in Pakchoi and Vegetable Soil

作　　者：周井刚[1] 郭正元[1] 梁菁[1] 冯丽萍[1] 

机构地区：[1]湖南农业大学农业环保研究所,长沙410128

出　　处：《农药》2008年第11期823-825,831,共4页Agrochemicals

基　　金：农业部课题<甲萘威在小白菜上安全使用标准研究>(NG20070111)

摘　　要：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。An analytical method for residue and degradation dynamics of carbaryl in pakchoi and vegetable soil were studied by HPLC. The results showed that： residues of carbaryl were extracted from pakchoi with dichloromethaneacetone mixture （60：5, by vol）, cleaned up by florisil, concentrated and then detected by reversed phase HPLC, the recoveries ranged from 85.11 to 109.98%, variation coefficient ranged from 3.61 to 9.36%. The degradation of carbaryl in pakchoi plant of Changsha and Guangzhou were conformed to the first-order dynamic equation; the relative coefficient were 0.8＂14 3 and 0.934 6; the half-life of carbaryl in pakchoi plant were 2.69 and 0.50 d. Residues of carbaryl were extracted from vegetable soil with acetone, concentrated and then detected by reversed phase HPLC, the recoveries ranged from 93.68 to 109.31%, variation coefficient ranged from 0.69 to 3.40%. The degradation of carbaryl in vegetable soil of Changsha and Guangzhou were conformed to the first-order dynamic equation; the relative coefficient were 0.9584 and 0.9322; the half-life of carbaryl in vegetable soil of Changsha and Guangzhou were 7.08 and 1.13 d.

关 键 词：甲萘威 高效液相色谱 农药残留 小白菜 菜园土壤 

分 类 号：TQ450.263[化学工程—农药化工]