Determination of methyl bromide residues in tea by headspace solidphase microextraction coupled with gas chromatography-mass spectrometry  

作　　者：Danyang Zhang Qingqing Zhu Zuguang Li Yunfeng Chai Hongping Chen 

机构地区：[1]Tea Research Institute,Chinese Academy of Agricultural Sciences,Hangzhou 310008,China [2]School of Chemical Engineering and Materials,Zhejiang University of Technology,Hangzhou 310008,China [3]Key Laboratory of Tea Quality and Safety&Risk Assessment,Ministry of Agriculture and Rural Affairs,Hangzhou 310008,China

出　　处：《Beverage Plant Research》2023年第1期12-17,共6页饮料植物研究（英文）

基　　金：supported by China Agriculture Research System of MOF and MARA(CARS-19),the Agricultural Science and Technology Innovation Project[CAAS-ASTIP-2020];Agricultural Science and Technology Innovation Program of CAAS[CAAS-ZDRW202011].

摘　　要：Methyl bromide has been the most widely applied fumigant in the world,but most countries have phased out production and application of methyl bromide due to its toxicity to humans and the ozone.In this study,a specific headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry(HS-SPME/GC-MS)method was developed,optimized and validated for the determination of methyl bromide residues in tea.The established method was evaluated in terms of specificity,sensitivity,linearity,accuracy and precision.Linear plots were obtained in the range of 0.05−2.0 mg·kg^(−1).The limit of quantification(LOQ)was 0.05 mg·kg^(−1).Recoveries for the accuracy ranged from 95.0%to 107.7%and the relative standard deviation was in the range of 0.4%−6.1%.This developed method was used to analyze 25 real samples and the results showed that methyl bromide residue was not found in all samples studied.Therefore,the established method can be applied to the determination of methyl bromide residues in tea,and provide a reference for the detection of methyl bromide residues in other plant-based beverages.

关 键 词：BROMIDE RESIDUES deviation 

分 类 号：S571.1[农业科学—茶叶生产加工]