Temporal-spatial analysis of cyromazine in cowpea using liquid chromatography–mass spectrometry coupled with mass spectrometry imaging  

作　　者：Xuemei Tang Congling Huang Jianxiang Huang Jiale Wang Zhiting Chen Yan Chen Zemiao Xiao Kai Wan 

机构地区：[1]Institute of Quality Standard and Monitoring Technology for Agro-Products of Guangdong Academy of Agricultural Sciences,Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality(Guangzhou),Ministry of Agriculture and Rural Affairs,National Reference Laboratory for Agricultural Testing(Pesticide Residues),Guangzhou,China

出　　处：《Food Quality and Safety》2023年第3期466-473,共8页食品品质与安全研究（英文版）

基　　金：supported by the National Key Research and Development Program of China(No.2019YFC1605600);the National Natural Science Foundation of China(No.21804024);Guangdong Provincial Key Laboratory of Quality&Safety Risk Assessment for Agro-Products(2019)(No.2019B121203009);the Special Fund for Science and Technology Innovation Strategy(Construction of High-Level Academy of Agricultural Sciences of Guangdong Province);the Natural Science Foundation of Guangzhou(No.2023A04J0787),China.

摘　　要：Background:Cowpea(Vigna unguiculata L.Walp.)is an economically important crop.It is nutritious and popular with consumers.However,it has been listed as one of the agricultural products of critical concern about safety in China and cyromazine is the major risk factor.Objectives:This study analyzed the dissipation and permeation kinetics of cyromazine residue in cowpea,to offer a scientific basis for the rational use of pesticide and ensure the safety of agricultural products.Materials and methods:The dissipation and residue level of the systemic insecticide cyromazine on cowpea under field and stored conditions were investigated.Subsequently,the spatial distribution of cyromazine was studied using mass spectrometry imaging to visualize the dynamic processes of permeation and migration in the tissues post pesticide application.Results:The dissipation processing of cyromazine in cowpea was shown to follow the first-order kinetics and half-life was 7.76 d in the field.In cowpea,the permeation and migration rate of cyromazine was faster than that in kidney beans and accumulation was mainly in the pulp.It is not safe to apply cyromazine to cowpeas with reference to the application method on kidney beans.Conclusions:These findings present vital data for the determination of risks linked with cowpea consumption and pesticide intake.

关 键 词：CYROMAZINE COWPEA mass spectrometry imaging pesticide residue 

分 类 号：TS201.3[轻工技术与工程—食品科学]