农业资源与环境学报Issue(5)：476-481,6.DOI:10.13254/j.jare.2014.0128
新型杀菌剂啶氧菌酯在田间黄瓜和土壤中的残留消解动态及残留分析
Residues and Analysis of Degradation of Novel Fungicide Picoxystrobin in Cucumber and Soil Under Field Conditions
摘要
Abstract
The analytical method for the residues of picoxystrobin in cucumber vegetable and soil matrices was developed and the dissipation of picoxystrobin under field conditions was studied. The limit of detection(LOD)of picoxystrobin was 3.5×10-11 g and the limit of quantifica-tion(LOQ)was found to be 0.005 mg·kg-1 in cucumber and soil. At three different spiking levels(0.005, 0.05, 0.25 mg·kg-1), mean recoveries and relative standard deviation(RSD)from fortified samples in five replicated experiments for each matrix were in the range of 68.61%~122.4%and 1.06%~17.2%, respectively. The results showed that the half-lives of picoxystrobin in cucumber and soil from Tianjin City were 5.71 d and 12.9 d, respectively, the half-lives of picoxystrobin in cucumber and soil from Shandong Province were 2.70 d and 10.3 d, respec-tively, and the half-lives of picoxystrobin in cucumber and soil from Jiangsu Province were 9.76 d and 14.9 d, respectively. The maximum residual concentration of picoxystrobin on the 5th day after the last application was 0.014 mg·kg-1, much lower than the Maximum Residue Limits(MRLs)for picoxystrobin in cucumber according to the standards of EU(0.05 mg·kg-1).关键词
啶氧菌酯/黄瓜/土壤/消解/残留Key words
picoxystrobin/cucumber/soil/dissipation/residues分类
资源环境引用本文复制引用
孙扬,徐应明,秦旭,赵立杰..新型杀菌剂啶氧菌酯在田间黄瓜和土壤中的残留消解动态及残留分析[J].农业资源与环境学报,2014,(5):476-481,6.基金项目
农业部农药残留试验资助项目 （）
