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Analysis of Tebuconazole and Tetraconazole Enantiomers by Chiral HPLC-MS/MS and Application to Measure Enantioselective Degradation in Strawberries

文献类型： 外文期刊

作者： Zhang, Hu 1 ; Qian, Mingrong 2 ; Wang, Xinquan 2 ; Wang, Xiangyun 3 ; Xu, Hao; Qi, Peipei; Wang, Qiang; Wang, Mi 1 ;

作者机构： 1.Nanjing Agr Univ, Jiangsu Key Lab Pesticide Sci, Key Lab Integrated Management Crop Dis & Pests, Dept Pesticide Sci,Coll Plant Protect,Minist Educ, Nanjing 210095, Jiangsu, Peoples R China

2.Zhejiang Acad Agr Sci, State Key Lab Breeding Base Zhejiang Sustainable, MOA Key Lab Pesticide Residue Detect, Inst Qual & Stand Agroprod, Hangzhou 310021, Zhejiang, Peoples R China

3.Zhejiang Acad Agr Sci, State Key Lab Breeding Base Zhejiang Sustainable, MOA Key Lab Pesticide

关键词： Enantioselectivity;Tebuconazole;Tetraconazole;HPLC-MS/MS;Strawberry

期刊名称：FOOD ANALYTICAL METHODS （ 影响因子：3.366； 五年影响因子：3.07 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： A rapid and sensitive enantioselective method for the determination of tebuconazole and tetraconazole enantiomers in strawberry has been developed. The enantiomers were resolved by high-performance liquid chromatography on a cellulose tris (3-chloro-4-methylphenylcarbamate) (Lux Cellulose-2) column using methanol–0.1% formic acid solution (70:30, v/v) as mobile phase. The chiral liquid chromatographic separation was combined with an extract/cleanup procedure known as the quick, easy, cheap, effective, rugged, and safe (QuEChERS) method. High-performance liquid chromatography-tandem mass spectrometry with electrospray ionization was then used for qualitative and quantitative determination of the enantiomers of tebuconazole and tetraconazole. Hexaconazole was used as an internal standard. The method provided high selectivity and sensitivity, and the limits of quantification for tebuconazole and tetraconazole enantiomers in strawberry were both 2.5 μg/kg. The method was successfully utilized to investigate the probable enantioselective degradation of tebuconazole and tetraconazole in strawberry. The results showed that the degradation of the tebuconazole and tetraconazole enantiomers in strawberry followed first-order kinetics (R 2>0.96). The results from this study revealed the degradation of tetraconazole in strawberry was not enantioselective, while the degradation of tebuconazole was enantioselective, and the (+)-tebuconazole showed a faster degradation than (-)-tebuconazole in strawberry. Theresults could provide a reference to fully evaluate risks of these two fungicides.

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