摘要
建立牛乳中万古霉素、去甲万古霉素和替考拉宁的高效液相色谱-串联质谱测定方法。采用多反应监测模式,外标法定量。通过对不同提取溶剂的考察,选择0.1%甲酸水溶液-乙腈溶液(85∶15,V/V)作为提取溶剂;牛乳样品经超声辅助提取后,选用阳离子交换柱对万古霉素和去甲万古霉素进行净化,采用C18固相萃取柱对替考拉宁进行净化;流动相选择乙腈-0.1%甲酸水溶液体系,并采用梯度洗脱模式;分析物经反相C18色谱柱分离后,用质谱进行测定。结果表明:万古霉素、去甲万古霉素和替考拉宁的检出限分别为2、1、2μg/kg,定量限(limit of quantitation,LOQ)分别为4、2、4μg/kg;在LOQ、5倍LOQ和10倍LOQ 3个添加水平下,3种分析物的方法回收率为77.3%~84.5%,相对标准偏差为4.7%~7.2%。该方法可用于市售牛乳样品中糖肽类抗生素万古霉素、去甲万古霉素和替考拉宁的检测。
A high performance liquid chromatography-tandem mass spectrometry（HPLC-MS/MS） method was developed for the determination of vancomycin, norvancomycin and teicoplanin in milk samples. Selective reaction monitoring was performed and the external standard method was used for quantification. Among various solvents tested, 0.1% formic acidacetonitrile（85：15, V/V） was selected. Samples were ultrasonically extracted and vancomycin and norvancomycin were cleaned up by cation exchange column chromatography, while teicoplanin was purified using a C18 solid-phase extraction（SPE） cartridge. Acetonitrile-0.1% formic acid solution was chosen as mobile phase for gradient elution. The analytes were separated on a reversed-phase C18 column before being analyzed by mass spectrometry. The limits of detection（LOD） for vancomycin, norvancomycin and teicoplanin were 2, 1 and 2 μg/kg, and the limits of quantitation（LOQ） were 4, 2 and 4 μg/kg, respectively. The recoveries of the method ranged from 77.3% to 84.5% at spiked levels equal to LOQ, 5 × LOQ and 10 × LOQ, with relative standard deviations（RSD） of 4.7%–7.2%. The method could be used in the qualitative and quantitative detection of vancomycin, norvancomycin and teicoplanin in milk samples.
作者
范素芳
王丽明
李强
张冬生
孙文毅
张岩
FAN Sufang;WANG Liming;LI Qiang;ZHANG Dongsheng;SUN Wenyi;ZHANG Yan(Hebei Key Laboratory of Food Safety, Hebei Food Inspection and Research Institute, Shijiazhuang 050091, China)
出处
《乳业科学与技术》
2018年第2期37-41,共5页
JOURNAL OF DAIRY SCIENCE AND TECHNOLOGY
基金
河北省自然科学基金面上项目(C2015321005)
关键词
牛乳
万古霉素
去甲万古霉素
替考拉宁
液相色谱-串联质谱
milk
vancomycin
norvancomycin
teicoplanin
high performance liquid chromatography-tandem mass spectrometry
作者简介
范素芳（1985-）,女,高级工程师,博士,研究方向为食品安全.E-mail：fansufang840502@163.com;通信作者：张岩（1979-）,男,教授级高级工程师,博士,研究方向为食品安全.E-mail：snowwinglv@126.com
