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超高效液相色谱-质谱联用测定蜂蜜中10种农药残留

2021-01-10王仁德吴升德谷群远汤勇刘锋

食品安全导刊·中旬刊 2021年11期

王仁德 吴升德 谷群远 汤勇 刘锋

摘 要:目的:利用QuEChERS法提取,采用超高效液相色谱-质谱建立同时测定蜂蜜中10种农药(多菌灵、啶虫脒、氯虫苯甲酰胺、杀扑磷、倍硫磷、乙螨唑、溴氰菊酯、哒螨灵、氯菊酯、联苯菊酯)残留的方法。方法:以Accucore aQ C色谱柱(2.6 µm,2.1 mm×150 mm)进行色谱分离,通过质谱的MRM扫描模式进行定性筛查和定量检测。结果:10种农药残留在一定浓度范围内呈良好的线性关系,相关系数均大于0.99,定量限(LOQ)为3~5 µg/kg。空白蜂蜜样品在2.5 µg/kg、5.0 µg/kg和10.0 µg/kg 3个加标水平的平均回收率为73.6%~110.8%,相对标准偏差为0.1%~7.5%。结论:该方法适合蜂蜜中农药多残留的快速筛查和定量分析。

关键词:蜂蜜;农药残留;超高效液相色谱-质谱联用

Determination of Ten Pesticide Residues in Honey by Ultra High Performance Liquid Chromatography-Mass Spectrometry

WANG Rende, WU Shengde*, GU Qunyuan, TANG Yong, LIU Feng

(Yancheng Products Quality Supervision and Inspection Institute, Yancheng 224056, China)

Abstract: Objective: To extract by QuEChERS method and establish the simultaneous determination of 10 pesticides in honey (carbendazim, acetamiprid, chlorantraniliprole, pyrethionine, fenthion, etoxazole, etc.) in honey Deltamethrin, pyridaben, permethrin, bifenthrin) residue methods. Methods: Chromatographic separation was performed on an Accucore aQ C18 column (2.6 µm, 2.1 mm×150 mm), and qualitative screening and quantitative detection were performed by the MRM scanning mode of mass spectrometry. Results: The 10 pesticide residues showed a good linear relationship within a certain concentration range, the correlation coefficients were all greater than 0.99, and the limit of quantification (LOQ) was 3~5 µg/kg. The average recoveries of blank honey samples at the three spiked levels of 2.5 µg/kg, 5.0 µg/kg and 10.0 µg/kg were 73.6%~110.8%, and the relative standard deviations were 0.1%~7.5%. Conclusion: This method is suitable for rapid screening and quantitative analysis of pesticide residues in honey.

Keywords: honey; pesticide residues; ultra high performance liquid chromatography

蜂蜜是我國传统的保健食品,也是我国重要的出口创汇农产品。蜜蜂在传播花粉、采集花蜜和花粉的过程中,不可避免的会接触到空气、水、农作物上残存的农药,而且蜂农为了防治蜜蜂的病虫害,生产中经常使用杀螨剂,造成农药在蜂产品中的残留。人们长期食用含有农药残留的蜂蜜,不利于身体健康。目前,我国现有国家标准和行业标准涉及蜂蜜中农药残留限量指标的仅有10项,已不符合市场需求,且不利于蜂蜜产品的质量控制。蜂蜜基质复杂,主要成分是葡萄糖、果糖、蔗糖和水分,除此之外,还含有蛋白质、矿物质、维生素和多酚类物质等,这使得蜂蜜中农药残留提取净化的前处理方法,以及检测分析方法的选择尤为重要。近年来蜂蜜中农药残留检测的前处理方法中,应用比较多的主要有液液萃取法、固相萃取法和QuEChERS法等。……

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