摘要
采用高效液相色谱(HPLC)分析方法,研究了多菌灵在草莓与土壤中的消解动态和最终残留。分析结果表明,多菌灵最低检出浓度为0.05 mg.kg-1,添加浓度在0.05～2.0 mg.kg-1范围内,回收率为81.6%～102.6%,变异系数为1.44%～5.35%。田间试验结果表明,多菌灵推荐浓度和加倍浓度在草莓中的消解动态方程分别为C=3.212 2e-0.1354t、C=8.810 3e-0.1379t,土壤中的消解动态方程分别为C=2.941 1e-0.1011t、C=6.173 3e-0.1144t。多菌灵消解较快,草莓中的消解半衰期为4.2～6.7 d,土壤中的消解半衰期为5.4～7.3 d。加倍浓度和推荐浓度各施药2次,30 d后残留量均降至0.1 mg.kg-1以下,低于多菌灵在果蔬中最大允许残留量(MRL)0.5 mg.kg-1。
An analytical method＂high-performance liquid chromatography（HPLC）＂was conducted to reveal residual dynamics and eventu-al residue of carbendazim in strawberry and soil.The results showed that the limit of determination was 0.05 mg.kg-1.When the added con-centration of carbendazim ranged from 0.05 mg.kg-1 to 2.0 mg.kg-1,the recoveries changed from 81.6% to 102.6% and the coefficients of variation varied from 1.44% to 5.35%.Carbendazim degrades comparatively fast and the result indicated that the kinetic equations of carben-dazim degradation in strawberry were C=3.212 2e-0.1354t and C=8.810 3e-0.1379t,and the half lives were 4.2～6.7 d,the kinetic equations of car-bendazim degradation in soil were C=2.941 1e-0.1011t and C=6.173 3e-0.1144t,and the half lives were 5.4～7.3 d.Double concentration and recom-mended concentration were respectively applied to deliver drug for twice,and the final residue showed that carbendazim residues were dropped below 0.1 mg.kg-1 after the residual 30 d,which was below the maximum allowable residues of carbendazim（MRL）0.5 mg.kg-1.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2010年第10期1948-1952,共5页
Journal of Agro-Environment Science
基金
2010年度北京市属高等学校人才强教深化计划--学术创新人才(PHR201006124)
北京果园常用农药残留检测技术研究与应用(Z09060500600906)
北京市属高等学校人才强教深化计划资助项目--蔬菜优质安全生产理论与技术体系创新研究(PHR200907136)
农产品加工及贮藏工程北京市重点建设学科(PXM2009-014207-078172)
关键词
多菌灵
残留
草莓
土壤
carbendazim
residue
strawberries
soil
作者简介
作者简介：郑志琴（1985-），女，山西人，硕士研究生，主要从事农药残留分析方向的研究。E—mail：zhengzhiqin614@163．com.
通讯作者：赵建庄E-mail：zhaojianzhuang@263．net
