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China Surfactant Detergent & Cosmetics ›› 2021, Vol. 51 ›› Issue (12): 1250-1258.doi: 10.3969/j.issn.1001-1803.2021.12.013

• Analytical methods and testing • Previous Articles     Next Articles

Determination of 23 illegally added antibiotics by UPLC-ESI-Q-TOF/MS in cosmetics

Zheng Jiaxin,Jia Changping()   

  1. Suzhou Institute for Drug Control, Suzhou, Jiangsu 215000, China
  • Received:2021-03-04 Revised:2021-11-24 Online:2021-12-22 Published:2021-12-21
  • Contact: Changping Jia E-mail:jiakane@126.com

Abstract:

The aim of the study is to develop an ultra high performance liquid chromatography-tandem mass spectrometry method for the identification and determination of 23 antibiotics in cosmetics. The samples were extracted by ultrasonic machine with acetonitrile, and the separation was executed on a column using a mobile phase consisting of 0.1% formic acid (A), and 0.1% formic acid- acetonitrile (B). The mass spectrometer was operated in positive ion mode, the determination was conducted in MS scan mode by the external standard method, and confirmatory analysis for target compounds was performed with the retention time and MS2 scan. The result show that the linear relationship of the 23 antibiotics in the linear range is good, and the correlation coefficient is greater than 0.995. The detection limit are between 0.05-1.36 μg/g, and the average recovery rate is in the range of 74.1%-125.5%, with RSD within 2.3%-13.2%. One batch of positive sample is detected in 22 batches of the samples. Trimethoprim is detected in cosmetics for the first time. The established method is simple, selective, sensitive and accurate, and can be used for determination of antibiotics in cosmetics.

Key words: UPLC-ESI- Q-TOF/MS, cosmetics, antibiotics

CLC Number: 

  • TQ658