保鲜剂抑霉唑在香蕉中的消解动态及残留分析  

Degradation dynamics and residue analysis of imazalil in banana

作　　者：韦典[1] 杨珂[1] 曾东强[1] 王彦辉[1,2] 王忠文[1] 刘晓亮[1] 

机构地区：[1]广西大学农药与环境毒理研究所,南宁530005 [2]广西农业科学院植物保护研究所,南宁530007

出　　处：《植物保护》2016年第4期174-178,共5页Plant Protection

基　　金：广西自然科学基金(2015GXNSFBA139062;2013GXNSFBA019049);广西大学科研基金项目(XJZ130368);国家现代农业产业技术体系广西创新团队建设(nycytxgxcxtd-03-10;nycytxgxcxtd-04-18-2);广西‘特聘专家’工程专项经费(2013B015)

摘　　要：采用GC-uECD法探索了室内自然温度和12~14℃恒温贮藏条件下抑霉唑在香蕉中的消解规律和最终残留量。方法的定量限为1~2μg/kg,在添加0.02、0.2、2mg/kg范围内平均回收率为94.7%~107.6%,相对标准偏差为1.0%~7.4%。采用该方法测定抑霉唑在香蕉中的残留,将抑霉唑按有效成分300~450mg/kg在香蕉上使用后,其在香蕉上的原始沉积量为1.596~1.848mg/kg,抑霉唑在香蕉中的消解行为符合一级降解动力学方程,在室内自然温度和12~14℃恒温贮藏条件下半衰期分别为8.9~10.2d和13.3d。Degradation dynamics and residue analysis of imazalil in banana were detected by GC-uECD with external standard method after the samples were extracted with acetonitrile and the extracts were cleaned up by PSA. The limits of detections （LOQs） were in the range of 1-2 μg/kg. The recoveries of imazalil were in the range of 94.7%-107.6% at the spiked levels of 0.02, 0.2 and 2 mg/kg in the whole banana and the pulp matrixes, and the relative standard deviations （RSDs） were in the range of 1.0%-7.4%. The method can be used for the determination of imazalil residues in banana. The results showed that imazalil initial residues in banana were in the range of 1. 596-1. 848 mg/kg after fruit soaking with imazalil of 300-400 mg/kg. The degradation dynamics of imazalil in banana accorded with the one-level kinetics equation, and the half-lives of imazalil stored at room tem- perature and 12-14℃ were 8.9-10.2 d and 13.3 d, respectively.

关 键 词：抑霉唑 香蕉 消解 残留 

分 类 号：X592[环境科学与工程—环境工程]