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Analytical method and risk assessment of pesticide in imported flowers

进口花卉农药残留分析方法及风险评估

基本信息

批准号：
21590721
负责人：
KAWATA Kuniaki
金额：
$ 2.83万
依托单位：
Nigata University of Phermacy and Applied Life Sciences
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2009
资助国家：
日本
起止时间：
2009 至 2011
项目状态：
已结题

项目摘要

A pretreatment method for residual pesticides in cut flower was developed. The pH of the extract, the extraction solvent and the cleanup method were evaluated. The investigated pesticides included two fungicides, chlorothalonil and hexaconazole, and six insecticides, carbaryl, cypermethrin, fenitrothion, fenvalerate and malathion. The most satisfactory recoveries were obtained using acetonitrile as the extraction solvent and InertSep GC/PSA for the cleanup step at pH 5.0 in these conditions. The overall recoveries were 75-126% and the relative standard deviations ranged from 2.1 to 16%. This method successfully applied to cut flower.Moreover, the indoor diffusion of spiked pesticides on the cut flower was evaluated. The volatilization of the spiked pesticides was confirmed with chlorothalonil, Hexaconazole, fenitrothion and malathion. The emission factor of fenitrothion was 0.10μg/(unit・h), which is higher than those of chlorothalonil Hexaconazole and malathion. The calculated inhalation exposure for fenitrothion from a cut flower(0.0082μg/kg・day) was 1/900 of the acceptable daily airway exposure level for fenitrothion(7.4μg/kg・day). Therefore, the effect of fenitrothion to human by emission factor appears to be low in daily life.

研究了一种切花中农药残留量的预处理方法。评价了浸提液的pH值、浸提溶剂和净化方法。调查的农药包括百菌清和己唑醇2种杀菌剂和西维因、氯氰菊酯、杀螟松、氰戊菊酯和马拉硫磷6种杀虫剂。在这些条件下，使用乙腈作为提取溶剂，InertSep GC/PSA用于pH 5.0的净化步骤，获得了最满意的回收率。总回收率为75-126%，相对标准偏差为2.1 - 16%。该方法成功地应用于切花，并对室内农药在切花上的扩散进行了评价。百菌清、己唑醇、杀螟松、马拉硫磷等农药的挥发性较强。杀螟松的排放因子为0.10μg/（unit.h），高于百菌清、己唑醇和马拉硫磷。计算的杀螟硫磷从切花中的吸入暴露量（0.0082μg/kg·d）是杀螟硫磷每日气道可接受暴露水平（7.4μg/kg·d）的1/900。因此，在日常生活中，杀螟硫磷通过释放因子对人体的影响似乎较低。