中文摘要：本文介绍了常压气相色谱-四极杆-飞行时间质谱法在苹果、梨、番茄、黄瓜和甘蓝中有机磷农药残留同时检测中的应用。与传统电子碰撞电离相比，大气压电离-气相色谱对所有分析物的灵敏度都高出1.0-8.2倍。本文采用优化的QuEChERS方法进行样本预处理，研究结果显示：校准曲线线性范围为10-1000μg/L，相关系数大于0.9845；平均回收率较满意：在70.0-115.9 %范围内；精准度较满意：所有RSDr < 19.7%，三种加标水平下，15种有机磷农药的RSDr < 19.5%。因此，常压气相色谱-四极杆-飞行时间质谱法在果蔬有机磷农药残留常规定量分析方面具有一定的应用潜力。
外文摘要：This paper describes the application of atmospheric pressure gas chromatography quadrupole-time-of-flight mass spectrometry for the simultaneous determination of organophosphorus pesticides in apple, pear, tomato, cucumber and cabbage. Soft ionization with atmospheric pressure ionization source was compared with traditional electron impact ionization (EI). The sensitivity of GC coupled to atmospheric pressure ionization (APGC) for all the analytes was enhanced by 1.0-8.2 times. The ionization modes with atmospheric pressure ionization source was studied by comparing the charge-transfer and proton-transfer conditions. The optimized QuEChERs method was used to pretreat the samples. The calibration curves were found linear from 10 to 1000 mu g/L, obtaining correlation coefficients higher than 0.9845. Satisfactory mean recovery values, in the range of 70.0-115.9%, and satisfactory precision, with all RSDr < 19.7% and all RSDR values <19.5% at the three fortified concentration levels for all the fifteen OPPs. The results demonstrate the potential of APGC-QTOF-MS for routine quantitative analysis of organophosphorus pesticide in fruits and vegetables. (C) 2017 Elsevier Ltd. All rights reserved.
 
外文关键词：Organophosphorus pesticides, APGC-QTOF-MS, Soft ionization, Fruits, Vegetables
作者：Cheng, Zhipeng; Dong, Fengshou; Xu, Jun; Liu, Xingang; Wu, Xiaohu; Chen,Zenglong; Pan, Xinglu; Gan, Jay; Zheng, Yongquan
作者单位：Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100193, Peoples R China.
期刊名称：Food Chemistry
期刊影响因子：4.052
出版年份：2017
出版刊次：3
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