农药学学报Issue(3)：307-312,6.DOI:10.3969/j.issn.1008-7303.2015.03.08
叶菌唑在小麦中的残留消解及膳食风险评价
Dissipation,residues and risk assessment of metconazole in wheat
石凯威 1汤丛峰 2李莉 3刘丰茂3
作者信息
- 1. 中国农业大学 理学院，北京100193
- 2. 中国科学院 动物研究所，农业虫害鼠害综合治理国家重点实验室，北京100101
- 3. 中国科学院 动物研究所，农业虫害鼠害综合治理国家重点实验室，北京100101
- 折叠
摘要
Abstract
In order to evaluate the residue behavior and dietary intake risk of metconazole applied to wheat,the residual trial of metconazole in wheat were carried out in Beijing,Anhui and Heilongjiang provinces. A new method was developed to determine the residue of metconazole in wheat. The risk assessment to different populations based on data of terminal residues in wheat was investigated. The samples were extracted with acetonitrile,purified by florisil SPE column,and determined by gas chromatography coupled with nitrogen phosphorus detector( NPD ). At fortified levels of 0. 02 -10 mg/kg,recoveries of metconazole in wheat and straw were between 81% -101%,with RSD of 2. 14% -9. 10%. The limits of quantification( LOQs)were 0. 02 mg/kg in grain,0. 04 mg/kg in straw. The results indicated that the dissipation of metconazole in straw fitted to the first order kinetics with half-lives of 4. 9-7. 3 days. At harvest period,the highest residue of metconazole in grain was 0. 037 mg/kg,which was lower than the maximum residue limit( MRL,0. 15 mg/kg)set by the United States and European Union. The risk quotients( RQs ) were between 0. 001 - 0. 002 for different populations in China,which indicated its low risk in wheat.关键词
叶菌唑/小麦/消解动态/残留/风险评价Key words
metconazole/wheat/dissipation/residue/risk assessment分类
农业科技引用本文复制引用
石凯威,汤丛峰,李莉,刘丰茂..叶菌唑在小麦中的残留消解及膳食风险评价[J].农药学学报,2015,(3):307-312,6.
