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《Chinese Journal of Analytical Chemistry》 2011-08
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Rapid Determination of Paclobutrazol in Fruits by QuEChERS Cleanup and Gas Chromatography-tandem Mass Spectrometry

SONG Ying1,2,ZHANG Yao-Hai2,HUANG Xia2,PAN Jia-Rong*1,JIAO Bi-Ning*2 1(Institute of Agro-Food Sciences and Technology,Chinese Academy of Agricultural Sciences,Beijing 100193) 2(Citrus Research Institute,Chinese Academy of Agricultural Sciences/Citrus Research Institute, Southwest University,Chongqing 400712)  
In this study,an analytical method was established for the determination of paclobutrazol in fruits(peach,leechee and cherry) using the Quick,Easy,Cheap,Effective,Rugged and Safe(QuEChERS) cleanup and gas chromatography-tandem mass spectrometry.The paclobutrazol of fruits sample was extracted with acetonitrile,removed the water with anhydrous magnesium sulfate and sodium chloride,cleaned up with dispersive method on primary secondary amine and graphitized carbon black,and detected by gas chromatography-tandem mass spectrometry under multiple reaction monitoring mode.The qualitative results were obtained based on the characteristic m/z 236125 and m/z 236167,and the quantitation results were on the intension of the characteristic m/z 236125.The recoveries of the paclobutrazol were in the range from 86.7% to 130% at the spike levels of 0.005,0.05 and 0.5 mg/kg into three fruits matrixes,the relative standard deviations(RSDs) were between 2.0% and 19.6%,and the limits of detection were 0.4,0.5 and 0.5 μg/kg.The method is simple,quick,safe,reproducible and applicable to confirm paclobutrazol residue in the fruits sample.
【Fund】: 国际原子能机构技术援助项目(No.CPR5018);; “十一五”国家863计划(No.2006AA10Z449);; “十一五”国家科技支撑计划项目(Nos.2007BAD47B07 2009BADB7B04);; 现代农业(柑桔)产业技术体系建设专项资助
【CateGory Index】: O657.63;TS255.7
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