嘧菌酯在草莓与土壤中的残留动态研究  

Residual Dynamics of Azoxystrobin in Strawberry and Soil

作　　者：杨振华[1] 魏朝俊[1] 贾临芳[1] 梁丹[1] 赵建庄[1] 

机构地区：[1]北京农学院农产品有害微生物及农残安全检测与控制北京市重点实验室,北京102206

出　　处：《农业环境科学学报》2013年第4期697-700,共4页Journal of Agro-Environment Science

基　　金：农产品加工及贮藏工程北京市重点建设学科(PXM2009-014207-078172);北京市属高等学校人才强教深化计划-学术创新人才(PHR201006124);科研平台-科技创新-农产品安全与农药残留分析创新平台建设;北京市属高等学校人才强教深化计划(PHR201108278);首都农产品安全产业技术研究院成果转化项目(PXM2012-014207-000019);北京市教委科技面上项目(KM201210020014);北京市优秀人才培养项目(2010D005021000005)

摘　　要：通过田间试验和气相色谱法研究了嘧菌酯悬浮剂在草莓和土壤中的消解动态和最终残留特性。结果表明:草莓和土壤中嘧菌酯添加浓度在0.05～1.0mg·kg-1范围内,回收率为97.16%～99.78%,变异系数为1.89%～3.67%,最小定量限(LOQ)均为0.02mg·kg-1;不同施药浓度[225、450g(a.i.)·hm-2]时,嘧菌酯在草莓和土壤中的消解半衰期分别为3.66～3.96d和6.31～8.79d;嘧菌酯悬浮剂(250g·L-1)在草莓上的使用剂量为225g(a.i.)·hm-2、间隔7d施药次数不超过3次时,草莓中嘧菌酯的最终残留量为0.17～0.20mg·kg-1,小于欧美与日本等国规定的最大残留限量(MRL)1.0mg·kg-1。Field trim and gas chromatography were carried out to study residual decline and final residues of azoxystrobin in the strawberry and soil. The results showed that when the added concentration of azoxystrobin ranged from 0.05 mg·kg-1 to 1.0 mg·kg-1, the recoveries changed from 97.16% to 99.78%, and the coefficients of variation varied from 1.89% to 3.67%. Meanwhile, the limit determination of azoxys- trobin was 0.02 mg·kg-1. The half-lives of azoxystrobin was 3.66 days to 3.96 days in strawberry and 6.31 days to 8.79 days in soil, respec- tively. The final residue of azoxystrobin（250 g＇L-1） SC was 0.17 mg·kg-1 to 0.20 mg·kg-1 when used in strawberry with the frequen- cy of administration was not more than 3 times, interval of 7 days, and it was less than 1.0 mg·kg-1 that the Maximum Residue Limits （MRL） of the U.S., Europe, Japan and other countries.

关 键 词：嘧菌酯 草莓 残留动态 气相色谱 

分 类 号：X592[环境科学与工程—环境工程]