职业与健康 ›› 2026, Vol. 42 ›› Issue (5): 614-619.

• 论著 • 上一篇    下一篇

母乳中10种四环素类抗生素及其代谢物超高效液相色谱-串联质谱的同时测定法

徐斯琦, 赖淼菊, 崔淑丹, 李强()   

  1. 上海市普陀区疾病预防控制中心,上海 200333
  • 收稿日期:2025-06-29 修回日期:2025-07-21 出版日期:2026-03-01 发布日期:2026-03-10
  • 通信作者: 李强,E-mail:817125@163.com
  • 作者简介:徐斯琦,女,检验技师,主要从事食品与环境污染物检测工作。
  • 基金资助:
    上海市普陀区公共卫生重点学科-卫生理化检验学(ptgw202001)

Simultaneous determination of 10 tetracycline antibiotics and their metabolites in breast milk by ultra-high performance liquid chromatography-tandem mass spectrometry

XU Siqi, LAI Miaoju, CUI Shudan, LI Qiang()   

  1. Shanghai Putuo District Center for Disease Control and Prevention,Shanghai 200333,China
  • Received:2025-06-29 Revised:2025-07-21 Online:2026-03-01 Published:2026-03-10
  • Contact: LI Qiang,E-mail:817125@163.com
  • About author:LI Qiang,E-mail:817125@163.com

摘要:

目的 建立同时测定母乳中二甲胺四环素、土霉素、四环素等10种四环素类抗生素及其代谢物的超高效液相色谱-串联三重四极杆质谱方法。方法 母乳样品经pH 4.0±0.5的Na2EDTA-Mcellvaine缓冲液提取后采用HLB固相萃取小柱进行净化,洗脱液经氮气吹干后用流动相复溶,经Acquity UPLC BEH C18色谱柱分离,使用电喷雾离子源(electric spray ion source,ESI)正离子模式和多反应监测(multi-reaction monitoring,MRM)进行检测,基质曲线法定量。结果 10种四环素类抗生素及其代谢物在定量限~22.5 μg/kg范围内呈良好的线性关系,相关系数均≥0.998,检出限为0.011~0.210 μg/kg,定量限在0.036~0.700 μg/kg,加标回收率为70.7%~118.0%,精密度为2.01%~11.70%。结论 该方法灵敏、快速、准确,适用于大人群母乳样本中四环素类抗生素及其代谢物含量的检测。

关键词: 超高效液相色谱-串联质谱法, 固相萃取, 母乳, 四环素, 代谢产物

Abstract:

Objective To establish an ultra-high performance liquid chromatography-tandem triple quadrupole mass spectrometry(UHPLC-MS/MS) method for the simultaneous determination of 10 tetracycline antibiotics and their metabolites(including minocycline, oxytetracycline,tetracycline,etc.) in breast milk. Methods Breast milk samples were extracted with Na2EDTA-Mcllvaine buffer(pH 4.0±0.5),purified using HLB solid-phase extraction(SPE) cartridges,and then reconstituted in mobile phase after nitrogen drying. Separation was performed on an Acquity UPLC BEH C18 column,followed by detection in electrospray positive ionization mode(ESI+) with multiple reaction monitoring(MRM). Quantification was achieved using matrix-matched calibration curves. Results The method demonstrated a good linearity for all 10 tetracyclines and their metabolites in the range of LOQ-22.5 μg/kg,with correlation coefficients(r)≥0.998. The limits of detection(LODs) ranged from 0.011 to 0.210 μg/kg,and the limits of quantification(LOQs) ranged from 0.036 to 0.700 μg/kg. The recoveries at spiked levels were 70.7%-118.0%,with precision between 2.01% and 11.70%. Conclusion This method is sensitive,rapid,and accurate,suitable for detecting of tetracycline antibiotics and their metabolites in breast milk samples of large-scale.

Key words: Ultra performance liquid chromatography-tandem mass spectrometry, Solid phase extraction, Breast milk, Tetracycline, Metabolites

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