基于拉曼光谱技术快速检测叶菜类蔬菜中噻虫嗪残留的方法  

Rapid determination of thiamethoxam residues in leafy vegetables based on Raman spectroscopy

作　　者：周玮[1] 夏婧竹 吴蓉[1] 朱晓军[1] 邹洁[1] ZHOU Wei;XIA Jingzhu;WU Rong;ZHU Xiaojun;ZOU Jie(Jiangsu Product Quality Supervision and Inspection Institute,Jiangsu Nanjing 210007,China;Nanjing S&S Instrument Co.,Ltd.,Jiangsu Nanjing 210049,China)

机构地区：[1]江苏省产品质量监督检验研究院,江苏南京210007 [2]南京简智仪器设备有限公司,江苏南京210049

出　　处：《中国食品卫生杂志》2023年第1期27-31,共5页Chinese Journal of Food Hygiene

基　　金：国家重点研发计划项目(2019YFC1605101);国家市场监督管理总局科技计划项目(2020MK040)。

摘　　要：目的基于表面增强拉曼光谱技术,建立一种叶菜类蔬菜中噻虫嗪农药残留拉曼快速检测的方法。方法以金纳米溶胶为增强基底,采用具有多孔结构的碳纳米笼材料作为净化剂,利用其比表面积大、吸附能力强的特性,去除蔬菜基质中的色素、有机酸等干扰,实现高灵敏度检测。结果本方法检出限可达1 mg/kg,在噻虫嗪浓度0.5~15 mg/kg范围内,线性关系良好,回收率为90.7%~121.7%,相对标准偏差为2.3%~7.5%。结论本方法灵敏度高、操作简单快速,适用于基层监管部门蔬菜中噻虫嗪农药残留的快速检测。Objective Based on surface enhanced Raman spectroscopy technology,a rapid detection method for thiamethoxam in leaf vegetables was established.Methods Using gold nanoparticles as the reinforced base and carbon nanocages with porous structure as the purifying agent,the interference of pigment and organic acid in vegetable was effectively removed based on its large specific surface area and strong adsorption capacity.Results The limit of detection was 1 mg/kg.In the range of 0.5-15 mg/kg of thiamethoxam,the linear relationship was good.The recoveries ranged from 90.7%to 121.7%with relative standard deviation of 2.3%-7.5%.Conclusion This method has high sensitivity,simple and rapid operation,and it is suitable for the rapid determination of thiamethoxam residues in vegetables by grass-roots supervision departments.

关 键 词：表面增强拉曼光谱 快速检测 新烟碱类农药残留 碳纳米材料 

分 类 号：R155[医药卫生—营养与食品卫生学]