Российский паразитологический журнал (Dec 2016)

DETERMINATION OF FENBENDAZOLE AND ITS METABOLITES IN MILK BY THE METHOD OF LIQUID CHROMATOGRAPHY COUPLED WITH TANDEM MASS SPECTROMETRY

  • P. P. Kochetkov,
  • A. I. Varlamova,
  • V. E. Abramov,
  • N. S. Misura,
  • E. V. Abramova,
  • S. B. Abramov,
  • N. I. Koshevarov,
  • I. A. Arkhipov

DOI
https://doi.org/10.12737/23082
Journal volume & issue
Vol. 38, no. 4
pp. 554 – 562

Abstract

Read online

Objective of research: Development of methods for the determination of fenbendazole and its metabolites in milk by liquid chromatography coupled with tandem mass spectrometry.Materials and methods: Fenbendazole was administered orally to five cows. Samples of milk were taken on 1, 3, 5 and 10 days of drug application. The research method includes a description of reagents, plates and equipment; mass-spectrometric conditions for analysis of fenbendazole and its metabolites; preparation of the equipment to operation; preparation of eluent solution; preparation of the chromatograph to analysis; determination of chromatographic parameters of standard drug samples; preparation of milk samples to analysis; establishment of parameters of extracts’ chromatography; procedure of calibration of fenbendazole and its metabolites in eluent.Results and discussion: When studying the pharmacokinetics of fenbendazole and its metabolites (sulfone and sulfoxide) in milk, it was found that the maximal concentrations were determined 24 h after drug administration and were 22,6 ng/ml for fenbendazole sulfone, 34,0 ng/ml for fenbendazole sulfoxide and 19,7 ng/ml for fenbendazole. 10 days after treatment, the concentrations of fenbendazole and its metabolites in milk did not exceed permitted values.

Keywords