Quantitative determination of sirolimus in dog blood using liquid chromatography-tandem mass spectrometry, and its applications to pharmacokinetic studies

Jong Hwa Lee, Kwang Ho Cha, Wonkyung Cho, Junsung Park, Hee Jun Park, Youngseok Cho, Sung Joo Hwang

Research output: Contribution to journalArticle

4 Citations (Scopus)


A rapid, sensitive method of detecting sirolimus in blood was developed and applied in pharmacokinetic studies employing deionized water for hemolysis and a weakly basic mobile phase to enhance chromatographic peak intensity. Dog blood samples were processed via liquid-liquid extraction and the amounts of sirolimus and tacrolimus, an internal standard, were quantified by LC-MS/MS. Specificity, the lower limit of quantification, linearity, accuracy, precision, dilution, recovery, matrix effects, robustness and stability were within the acceptable range for assay validation. The concentration of sirolimus was quantifiable in blood samples for up to 36 h after the dog had received a 3 mg/kg dose of sirolimus. These observations suggest that sirolimus can be detected at low levels in dog blood using a basic mobile phase and metal-free hemolysis. This method is therefore applicable to pharmacokinetic studies in dogs.

Original languageEnglish
Pages (from-to)1042-1047
Number of pages6
JournalJournal of Pharmaceutical and Biomedical Analysis
Issue number4
Publication statusPublished - 2010 Dec 1


All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Pharmaceutical Science
  • Drug Discovery
  • Spectroscopy
  • Clinical Biochemistry

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