柑橘中氨苄青霉素QuEChERS-液质联用检测方法的建立及残留降解动态测定  

Establishment of QuEChERS-LC/MS Method for Detection of Ampicillin in Citrus and Its Dynamic Determination of Residual Degradation

作　　者：唐昭领 莫秋云 李惠静 韦福广 罗晓慧 陈蔚 陶剑恒 TANG Zhaoling;MO Qiuyun;LI Huijing;WEI Fuguang;LUO Xiaohui;CHEN Wei;TAO Jianheng(Hezhou Inspection and Testing Center,Hezhou 542800,China)

机构地区：[1]贺州市检验检测中心,贺州542800

出　　处：《食品与发酵科技》2024年第2期123-128,133,共7页Food and Fermentation Science & Technology

基　　金：贺州市中央引导地方科技发展专项资金项目(贺科ZY2023004);贺州市科学研究与技术开发计划项目(贺科能2109011);贺州市科学研究与技术开发计划项目(贺科能2022108)。

摘　　要：建立基于石墨化多壁碳纳米管(G-MWCNTs)的改良QuEChERS法结合液质联用技术测定柑橘中氨苄青霉素(Ampicillin)的简便、快速、准确的检测方法。在优选的色谱及质谱条件下,首先考察不同提取溶剂对氨苄青霉素提取回收率的影响;然后考察4种吸附剂的用量对氨苄青霉素回收率的影响,并优化净化剂使用量。结果表明,氨苄青霉素在0.5~100ng/mL浓度范围内线性关系良好,相关系数(R^(2))均大于0.999,基质效应(matrix effect,MEs)在9.0%~21.2%之间,低、中、高(2、40、200μg/kg)3水平下的平均回收率为85.9%~102.4%,相对标准偏差(Relative Standard Deviation,RSD)为2.1%~5.8%,检测限(Limit of Detection,LOD)和定量限(Limit of Quantity,LOQ)分别为1.0μg/kg和4.0μg/kg。在降解动态试验中,氨苄青霉素在沃柑和脐橙中的降解半衰期分别为1.2d和1.1d。该方法简便、快速、灵敏、准确,可为柑橘的质量评价提供有效的检测方法。To establish a simple,rapid and accurate method for the determination of ampicillin in citrus by improved QuEChERS method based on graphitized multi-walled carbon nanotubes(G-MWCNTs)combined with liquid chromatography-mass spectrometry.Under the optimized separation and detection conditions,the effects of different extraction solvent on the ampicillin recoveries were investigated.Then,the four kinds of adsorbent dosages on the purification efficiency were evaluated in terms of ampicillin recoveries,and the dosage of purification agent was optimized.The results showed that the linear relationship was good for ampicillin in the range of 0.5~100 ng/mL,the correlation coefficient were all greater than 0.999,the calculated matrix effects(MEs)ware 9.0%~21.2%.Under three different spiked concentrations(2,40,200μg/kg),the average recoveries were obtained in the ranges of 85.9%~102.4%.The relative standard deviation(RSD)ware 2.1%~5.8%.The limits of detection(LOD)and limits of quantitation(LOQ)were 1.0μg/kg and 4.0μg/kg,respectively.Degradation dynamics test of the results showed that the half-lives of ampicillin in Fuchuan Citrus and Fuchuan navel orange were 1.2 d and 1.1 d.This proposed method is simple,rapid,sensitive and accurate,and it could provide an effective detection method for the quality evaluation of citrus.

关 键 词：柑橘 氨苄青霉素 液质联用 QUECHERS 降解动态 

分 类 号：TS207.3[轻工技术与工程—食品科学]