Tip-assisted ambient electric arc ionization mass spectrometry for rapid detection of trace organophosphorus pesticides in strawberry  

作　　者：Zihan Ma Yuanji Gao Fengjian Chu Yunli Tong Yuwen He Yuan Li Zhan Gao Weiwei Chen Shuheng Zhang Yuanjiang Pan 

机构地区：[1]Department of Chemistry,Zhejiang University,Hangzhou 310027,China [2]College of Chemistry and Materials Science,Sichuan Normal University,Chengdu 610068,China [3]College of Information Science and Electronic Engineering,Zhejiang University,Hangzhou 310027,China [4]Zhejiang East Asia Pharmaceutical Co.,Ltd.,Taizhou 317108,China

出　　处：《Chinese Chemical Letters》2022年第9期4411-4414,共4页中国化学快报（英文版）

基　　金：supported by National Natural Science Foundation of China(No.21927810);the Project of Experimental Technology and Management(No.SYJS2020010);the laboratorybased open project in Sichuan Normal University(No.KFSY2020004).

摘　　要：In this study,an ambient mass spectrometry(AMS)based method was developed for rapid detection of organophosphorus pesticides in strawberry.This method combines an electric arc and a microsyringe tip to realize tip-assisted ambient electric arc ionization(TAAEAI).A high-voltage electric arc can be applied to the microsyringe tip to generate an electric field,which results in corona discharge at the microsyringe tip.The juiced strawberry sample loaded on the tip could be directly ionized with TAAEAI and then analyzed by a mass spectrometer.TAAEAI-MS was successfully applied to analyze 6 organophosphorus pesticides in three strawberry samples.Malathion and profenofos were detected from the investigated strawberry samples.This method could quantitatively determine the contents of organophosphorus pesticides in strawberry with high reproducibility,high precision,and high sensitivity.Sample matrices did not interfere with the pesticide analysis.The recoveries of organophosphorus pesticides spiked in strawberry samples varied between 82.6%and 116%with relative standard deviations(RSDs)less than 9.2%.The limits of detection(LODs)varied between 0.0124µg/g and 0.0245µg/g,while the limits of quantification(LOQs)varied between 0.0413µg/g and 0.0817µg/g.The coefficients of determination(R2)of the method were determined to be>0.995.The method established here may have potential application in the detection of organophosphorus pesticides in vegetables and fruits.

关 键 词：Pesticide Ambient mass spectrometry Tip-assisted ambient electric arc ionization STRAWBERRY Matrix interference 

分 类 号：O657.63[理学—分析化学] TS255.7[理学—化学]