QuEChERS-GC-ECD快速测定葡萄和土壤中苯醚甲环唑残留
QuEChERS-GC-ECD Rapid Determination of the Difenoconazole Residues in Grapes and Soils
罗雪婷 1吴迪 1潘洪吉 1张希跃 1矫健1
作者信息
摘要
[目的]对苯醚甲环唑在葡萄和土壤中的残留分析方法进行探讨并测定其残留消解动态.[方法]采用乙腈提取、基质固相分散净化后,GC-μECD外标法定量.[结果]在葡萄和土壤样品中添加0.01 ～2.00 mg/L苯醚甲环唑,葡萄的平均回收率为88.5％～107.3％,相对标准偏差为4.2％～6.8％;土壤的平均回收率为85.9％～115.9％,相对标准偏差为1.7％～7.3％;苯醚甲环唑在葡萄中的消解动态方程为y=1.165e-0.11x,在土壤中的消解动态方程为y =0.172e-0.04x,其在葡萄中半衰期为6.3d,在土壤中半衰期为17.3 d.[结论]该方法灵敏度、准确度、精密度高,前处理简单,仪器耗材普遍易得,能够为大规模监测苯醚甲环唑的残留情况提供参考.
Abstract
[Objective] To discuss the residue analysis methods of difenoconazole in grapes and soils,and to detect the residue degradation dynamics.[Method] Detection was carried out by acetonitrile method,quantitative external standard method,and matrix solid-phase dispersion after purification.[Result] When adding 0.01-2.00 mg/L difenoconazole in blank grape and soil sample,the average recovery rate of grape was 88.5％-107％ with 4.2％-6.8％ relative standard deviation;the average recovery rate of soil was 85.9％-115.9％ with 1.7％-7.3％ relative standard deviation.Digestion dynamic equation of difenoconazole in grape was y =1.165 e-0.11x,that in soil was y =0.172e-0.04x.The halflife periods in grape and soil were 6.3 and 17.3 d,respectively.[Conclusion] This method has high sensitivity,accuracy and precision with simple pretreatment and widely available instruments,which provides references for the large-scale monitoring of difenoconazole residue.
关键词
苯醚甲环唑/残留/葡萄/土壤/消解动态Key words
Difenoconazole/Residue/Grape/Soil/Degradation dynamics引用本文复制引用
出版年
2016
国家科技期刊平台
NSTL
维普
万方数据