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学科主题: 分析化学
题名: Rapid simultaneous screening and identification of multiple pesticide residues in vegetables
其他题名: 蔬菜中多种杀虫剂残留物的快速同步筛选和鉴定
作者: Zhang F(张芳) ; Yu CT(余翀天) ; Wang WW(王文文) ; Fan RJ(范若静) ; Zhang ZX(张之旭) ; Guo YL(郭寅龙)
通讯作者: 郭寅龙
刊名: Anal. Chim. Acta
发表日期: 2012
卷: 757, 页:39-47
收录类别: SCI
部门归属: 中科院上海有机化学研究所; 安捷伦科技公司
英文摘要: A method for the rapid simultaneous screening and identification of multiple pesticide residues in vegetables was established using a novel database and gas chromatography in combination with hybrid quadrupole time-of-flight mass spectrometry (GC-QTOF MS). A total of 187 pesticides with different chemical species were measured by GC-QTOF MS to create the database, which collected the retention time and exact masses of ions from the first-stage mass spectrum (MS1 spectrum) and second-stage mass spectrum (MS2 spectrum) for each pesticide. The workflow of the created database consisted of "MS1 screening" for possible pesticides by chemical formula match and "MS2 identification" for structural confirmation of product ion by accurate mass measurement. To evaluate the applicability of the database, a spinach matrix was prepared by solid phase extraction, spiked with a mixture of 50 pesticides at seven concentrations between 0.1 and 10 ppb, and analyzed by GC-QTOF MS. It was found that all of the 50 pesticides with concentrations as low as 5 ppb were detected in the "MS1 screening" step and accurate masses were identified with errors less than 2.5 mDa in the "MS2 identification" step, indicating high sensitivity, accuracy, selectivity and specificity. Finally, to validate the applicability, the new method was applied to four fresh celery, rape, scallion and spinach vegetables from a local market. As a result, a total of 13 pesticides were found, with 11 in celery, 9 in rape, 3 in scallion and 2 in spinach. In conclusion, GC-QTOF MS combined with an exact mass database is one of the most efficient tools for the analysis of pesticide residues in vegetables. (C) 2012 Elsevier B.V. All rights reserved.
语种: 英语
相关网址: 查看原文
WOS记录号: WOS:000312514800005
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内容类型: 期刊论文
URI标识: http://ir.sioc.ac.cn/handle/331003/28677
Appears in Collections:分析化学研究室_期刊论文

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Recommended Citation:
Zhang F,Yu CT,Wang WW,et al. Rapid simultaneous screening and identification of multiple pesticide residues in vegetables[J]. Anal. Chim. Acta,2012,757:39-47.
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