摘要
建立了一种超高效液相色谱-串联质谱(UPLC-MS/MS)同时测定动物源性食品中8种多肽类抗生素残留量分析方法。试样经甲醇-水-甲酸(40∶60∶0.1,v/v/v)提取,固相萃取法净化后,以0.1%甲酸水溶液和0.1%甲酸乙腈溶液为流动相,梯度洗脱,经C18色谱柱分离后,在正离子扫描模式下,采用选择反应监测(SRM),外标法定量。结果表明,8种多肽抗生素方法检出限为0.1~10μg/kg,去甲万古霉素和万古霉素在20~1000μg/L范围内,多粘菌素B和E在40~1000μg/L范围内,杆菌肽A在10~1000μg/L范围内,杆菌肽B在6~614μg/L范围内,维吉尼霉素M1和S1在1~100μg/L范围内,线性关系良好,相关系数r〉0.999,加标回收率为61.0%~99.6%,RSD为1.2%~9.8%。该方法简便快速、灵敏度高、重现性好,可满足动物源性食品中多肽类抗生素残留的同时测定。
An ultra performance liquid chromatography tandem mass spectrometry(UPLC-MS-MS) method had been established for the simultaneous determination of eight polypeptide antibiotics in animal derived food.Test sample was extracted by methanol-water-formic acid(40∶60∶0.1,v/v/v),followed by cleaning up method based on solid phase extraction(SPE). Extracts were separated on a C18 column using a gradient elution of0.1% formic acid water solution and 0.1% formic acid acetonitrile solution. Analytes were detected by ultra-perform liquid chromatography tandem mass spectrometry in positive ion mode with selected reaction monitoring(SRM). The results showed that the limits of detection(LOD) of 8 polypeptide antibiotics were 0.1~10 μg/kg.The calibration curves for norvancomycin and vancomycin(concentration range 20~1000 μg/L),polymyxin B and E(concentration range 40 ~1000 μg/L),bacitracin A(concentration range 10 ~1000 μg/L),bacitracin B(concentration range 6~614 μg/L),virginiamycin M1 and S1(concentration range 1~100 μg/L) were linear with correlation coefficients more than 0.999. The recoveries were in the range of 61.0% ~99.6%. The relative standard deviations(RSDs) ranged from 1.2%~9.8%. The method was simple and rapid with high sensitivity and good reproducibility,and was appropriate for the identification and quantification of polypeptide antibiotics residue in animal derived food.
出处
《食品工业科技》
CAS
CSCD
北大核心
2016年第8期85-91,共7页
Science and Technology of Food Industry
基金
深圳市技术创新计划技术攻关项目(JSGG2014051911405031)
关键词
多肽抗生素
动物源性食品
固相萃取
超高效液相色谱-串联质谱
polypeptide antibiotic
animal derived food
solid-phase extraction
ultra performance liquid chromatography tandem mass spectrometry(UPLC-MS/MS)