A method to determinate the residues of prochloraz and its metabolites in rice were established by UPLC-MS/MS.The samples of brown rice,rice husk and straw were extracted with acetonitrile,purified by matrix dispersion solid phase extraction.Then at the high temperture,prochloraz reacted with pyridine hydrochloride to generate 2,4,6-trichlorophenol,the analytes were separated on XR-ODSⅢ C18 column,and quantified by an external standard method.The results indicated that the recoveries of prochloraz were 70％-84％,the relative standard deviations were 0-4.6％,at the adding level of 0.05-5 mg/kg.The limit of quantitation(LOQ)of prochloraz was 0.05 mg/kg.The method was simple,accurate,and suitable for quantitative detection of prochloraz and its metabolites in rice.
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