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《Journal of Analytical Science》 2007-05
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Analysis of Prochloraz Residue in Mushroom with Liquid Chromatography/Mass Spectrometry

LIU Xun-cai1,2,CHEN Ping2,SHEN Jing2,CHENG Yun-bin2,CHEN Hao*1(1.College of Science,Huazhong Agriculture University,Wuhan 430070;2.Testing Center,Hubei Academy of Agriculture Science,Wuhan 430064)  
In this paper,solid-phase extraction(SPE) combined with high performance liquid chromatography(LC)/electrospary ionization mass spectrometry(ESI/MS) was used to detect the residue of prochloraz,an ergosterol biosynthesis inhibiting fungicide,in mushroom.Samples were extracted from mushroom with acetonitrile,then the extracts were salted out with NaCl and MgSO4.Supernatant was concentrated with gas and cleaning-up with SPE.After filtrating with 0.45 μm millipore filter,the solution was detected by LC-MS.Optimized conditions involved separation on a ZORBAX Eclipse XDB-C18 column(150×2.1 mm,3.5 μm) at 40℃,acetonitrile and 0.1% acetic acid(70+30,V/V)at 0.2 mL/min as mobile phase.The analysis was performed in the selected ion monitoring(SIM)mode with m/z380,378,376,312,310 and 308.The fortified recovery of prochloraz ranged from 95.0% to 100.1%,with coefficient of variance(CV)in the region of 1.72%~8.71%.The limit of detection was 2.86 μg/L(S/N10).The developed method is accurate and has been applied to the investigation of the degradation of prochloraz 50% WP in mushroom with satisfactory results.
【CateGory Index】: O657.63;TS207
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