浸果处理后苯醚甲环唑在柑橘贮藏过程中残留量的变化  

Change of Difenoconazole Residue Levels in Citrus During Storage after Soaking

作　　者：王军[1,2] 温家钧[1] 花日茂[2] 汤峰[2] 边侠玲[1] 岳永德[3] 

机构地区：[1]安徽省化工研究院,合肥230041 [2]安徽农业大学资源与环境学院,合肥230036 [3]国际竹藤网络中心,北京100102

出　　处：《农药学学报》2009年第3期341-345,共5页Chinese Journal of Pesticide Science

基　　金：农业部农药残留资助项目

摘　　要：研究了贮藏期间柑橘中苯醚甲环唑残留量变化与浸果处理药液浓度、贮藏温度和贮藏时间的关系,以及果实不同部位残留水平的差异。柑橘经苯醚甲环唑药液浸泡处理后在常温或低温条件下贮藏,定期取样用丙酮-石油醚(3∶1,体积比)提取,气相色谱测定。当添加浓度范围为0.05～5.0mg/kg时,本方法回收率在81.9%～91.4%之间,相对标准偏差为5.3%～17.5%,最低检出浓度为0.02mg/kg。试验结果表明:柑橘中苯醚甲环唑残留水平与药液浓度呈正相关;低温贮藏下柑橘对苯醚甲环唑的吸收低于常温;苯醚甲环唑的残留水平随贮藏时间的延长而下降;橘皮中苯醚甲环唑的残留明显高于橘肉。建议10%苯醚甲环唑水分散粒剂的使用浓度为100mg/L,其贮藏安全间隔期为21d。The residue levels of difenoconazole in citrus were studied during storage at different conditions,including preserving temperature,storing time,the concentration of difenoconazole and the position of citrus.The whole fruits were stored at room temperature or at low temperature after treatment with soaking in difenoconazole solution.Difenoconazole residue in citrus was extracted with acetone-petroleum,and determined by gas chromatography（GC）.At concentration range of 0.05～5.0 mg/kg,the recoveries and relative standard deviation were found to be 81.9%～91.4%,5.3%～17.5% respectively,and the limit of detection （LOD） was 0.02 mg/kg.The result showed that the residue levels of difenoconazole related to the concentration of difenoconazole.It＇s noted that difenoconazole residue may be absorbed less in citrus at low temperature compared with room temperature.In the meantime,residue of difenoconazole was declined gradually with the storage time,with higher residue in peel than in pulp.It＇s proposed that 10% WG difenoconazole may be used for citrus storage treatment at a concentration of 100 mg/L,with PHI of at least 21 days.

关 键 词：柑橘 贮藏 苯醚甲环唑 残留量 气相色谱 

分 类 号：S481.8[农业科学—农药学] O657.71[农业科学—植物保护]