氯吡脲在土壤和黄瓜中的残留分析

建立了氯吡脲在土壤和黄瓜中残留的HPLC分析方法,氯吡脲的添加回收率大于80%,变异系数小于12%,最小检出浓度为3.75×10-3 mg/kg,检测限为3.0×10-10g.对黄瓜消解动态的研究表明,氯吡脲在黄瓜中消解较快,半衰期为5.50～7.61d;黄瓜收获时(施药后40 d),样品中未检出氯吡脲残留.土壤消解动态研究表明:氯吡脲在土壤样品中的半衰期为6.54～8.39 d;黄瓜收获时(施药后40d),土壤中均未检出氯吡脲残留.

Residue Analysis of Forchlorfenuron in Cucumber and Soil

The forchlorfenuron residue in soil and cucumber were determined by HPLG analysis method.The results revealed that the fortified recovery was more than 80%,the coefficient of variation was less than 12%,the detectable concentration was 3.75 ×10-3mg/kg and the detection limit was 3.0 ×10-10g.The degradation dynamics research of forchlorfenuron indicated that the forchlorfenuron degraded quickly in cucumber,whose half life was 5.50～7.61 days,and when cucunlber harvest(40 days after applied forchlorfenuron),the forchlorfenuron residue was not detected in samples;the half life of forchlorfenuron in soil samples was 6.54～8.39 days,and when cucumber harvest(40 days after appliedforchlorfenuron).the forchlorfenuron residue also was not detected in samples.