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Simultaneous Screening of 733 Pesticide Residues in Fruits and Vegetables by a gc/LC-q-tofms Combination Technique

Engineering 2020年第4期6卷 432-441页

作者： Guofang Pang qiaoying Chang Ruobin Bai Chunlin Fan Zijuan Zhang Hongyuan Yan Xingqiang Wu Chinese Academy of Inspection and quarantine Beijing 100176China College of Chemistry and Environmental Science Hebei UniversityBaoding 071002China Beijing Uni-Star Inspection Technology Co.Ltd. Beijing 100176China

In this paper,we report the construction of two accurate mass databases and the development of a combination detection method that simultaneously screens for 733 pesticide and chemical contaminant multi-residues via high-throughput liquid chromatography(LC)-and gas chromatography(gc)-quadru pole-time-of-flight mass spectrometry(q-tofms).This work demonstrates that electronic mass spectral standards may replace chemical-source standard materials as references through one sample preparation and the combination of gc/LC-q-tofms *** cutting-edge technique has also replaced multiresidue determination using targeted detection with non-targeted *** pesticide residue types,sensitivity,recovery,and reproducibility of this combination technique are evaluated in eight fruit and vegetable *** technique shows three advantages:①In comparison with the discovery capability of a single technique,the combination technique shows an improvement of 51.1%(gc-qtofms)and 39.6%(LC-q-tofms),respectively;②the combination technique can satisfy a screening limit lower than 10μg·kg^-1 and meet the requirements of“uniform standards,”although some of the pesticide residues could be optimized to further improve screening sensitivity;③over 488 pesticides with recoveries between 60%-120%and relative standard deviation(RSD)que in eight different *** 2012 to 2017,this combination technique was applied in an investigation to screen pesticide residues from 1384 sampling locations for 38138 batched samples covering 18 categories and 134 types of fruits and vegetables obtained from across the mainland of *** statistical analysis,533 pesticides in 115891 determinations were detected,and the regularity of pesticides in the fruits and vegetables sold on the Chinese market was shown.

关键词： Pesticide multi-residues gc-q-tofms LC-q-tofms Accurate mass database Spectra library Fruits and vegetables

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