Determination of tebuconazole, trifloxystrobin and its metabolite in fruit and vegetables by a Quick, Easy, Cheap, Effective, Rugged and Safe (QuEChERS) method using gas chromatography with a nitrogen-phosphorus detector and ion trap mass spectrometry

文献类型： 外文期刊

第一作者： Wang, Xu

作者： Wang, Xu;Xu, Jun;Dong, Fengshou;Zheng, Yongquan;Song, Wencheng

作者机构：

关键词： QuEChERS method;gas chromatography-ion trap mass spectrometry;gas chromatography-nitrogen-phosphorus detector;tebuconazole;trifloxystrobin and trifloxystrobin acid;residue

期刊名称：BIOMEDICAL CHROMATOGRAPHY （ 影响因子：1.902； 五年影响因子：1.809 ）

ISSN： 0269-3879

年卷期： 2011 年 25 卷 10 期

页码：

收录情况： SCI

摘要： A new analytical method using QuEChERS procedure by gas chromatography with a nitrogen-phosphorus detector (GC-NPD) and ion trap mass spectrometry (GC-IT-MS) for the quantitative determination of tebuconazole, trifloxystrobin and its metabolite trifloxystrobin acid has been developed and validated. The analytes were extracted from five fruit and vegetable matrices using acetonitrile and subsequently cleaned up using primary secondary amine (PSA) or octadecylsilane (C18) as sorbent prior to GC analysis. The present methods provided sufficient sensitivity as reflected by the values of limit of detection (LOD) and limit of quantification (LOQ) of 0.4-7 and 1.2-20 mg/kg for GC-IT-MS/MS and GC-NPD. The recoveries were, on average, 68-117 and 68-121%, respectively, for three compounds by GC-NPD and GC-IT-MS/MS with intra-day precision achieved with an RSD of 2.7-19.1%. The inter-day precision was better than 15.1% as determined by GC-NPD. The QuEChERS procedure, by using two sorbents (PSA and C18) and the matrix-matched standards, gave satisfactory recoveries and RSD values in different matrices. IT-MS acquisition provided higher specificity and selectivity for pesticides and better limit of detection and quantification. However, the repeatability and precision of NPD method were better compared with IT-MS. Copyright (C) 2011 John Wiley & Sons, Ltd.

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