摘要
目的探究日光温室下的黄瓜中吡虫啉的残留,并进行消解动态研究。方法按照新版《农作物中农药残留试验准则》中的施药剂量、次数、施药间隔,于2020年在山东寿光开展日光温室黄瓜的最终残留和消解动态实验。利用QuEChERS前处理技术与高效液相色谱-串联质谱结合研究日光温室黄瓜中吡虫啉的最终残留及消解动态。结果吡虫啉在日光温室黄瓜中的消解动态的动力学曲线方程为C=0.0286e^(-0.262t),R^(2)=0.6243,半衰期为2.65d;最终残留实验中,7、10d日光温室黄瓜吡虫啉的残留浓度平均分别是0.0148 mg/kg和低于0.01 mg/kg。结论在符合新版《农作物中农药残留试验准则》的施药方法下,吡虫啉在日光温室黄瓜中的残留量小于国家规定的最大残留限量。
Objective To investigate the residues of imidacloprid in cucumber under solar greenhouse,and to study the digestion dynamics.Methods According to the dose,times and intervals of pesticide application in the new Guideline for the testing of pesticide residues in crops,the final residue and digestion dynamic experiments of solar greenhouse cucumbers were carried out in Shouguang,Shandong province in 2020.The final residues of imidacloprid in solar greenhouse cucumbers were studied by QuEChERS pretreatment technology and high performance liquid chromatography-tandem mass spectrometry.Results The dynamic curve equation of the digestion dynamics of imidacloprid in solar greenhouse cucumbers was C=0.0286e^(-0.262t),R^(2)=0.6243,T_(1/2)=2.65 d.The average residual concentration of imidacloprid in solar greenhouse cucumbers on 7,10 d in final residue test were 0.0148 mg/kg and less than 0.01 mg/kg.Conclusion Under the new Guideline for the testing of pesticide residues in crops application method of this study,the residue of imidacloprid in solar greenhouse cucumbers is less than the maximum residue limit set by the country.
作者
郭静远
张乐
王猛强
王淼
邵华
金芬
GUO Jing-Yuan;ZHANG Le;WANG Meng-Qiang;WANG Miao;SHAO Hua;JIN Fen(Institute of Quality Standard and Testing Technology for Agro-Products of CAAS,Beijing 100081,China;School of Life Sciences and Food Engineering,HUE,Handan 056021,China)
出处
《食品安全质量检测学报》
CAS
北大核心
2021年第9期3455-3459,共5页
Journal of Food Safety and Quality
基金
国家重点研发计划项目(2019YFC1605601)。
关键词
吡虫啉
日光温室黄瓜
农药残留
消解动态
imidacloprid
solar greenhouse cucumbers
pesticide residue
dissipation dynamics
