1. A liquid chromatography/tandem mass spectrometry method for determination of aristolochic acid-I in rat plasma
- Author
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Zhifeng Wu, Aihua Lin, Yiming Liu, Haiding Huang, and Run-mei Ou
- Subjects
Quality Control ,Analyte ,Clinical Biochemistry ,Analytical chemistry ,Aristolochic acid ,Tandem mass spectrometry ,Mass spectrometry ,Biochemistry ,Analytical Chemistry ,Rats, Sprague-Dawley ,Plasma ,chemistry.chemical_compound ,Tandem Mass Spectrometry ,Liquid chromatography–mass spectrometry ,Drug Discovery ,Animals ,Enzyme Inhibitors ,Intubation, Gastrointestinal ,Molecular Biology ,Chromatography, High Pressure Liquid ,Pharmacology ,Chromatography ,Finasteride ,Selected reaction monitoring ,Reproducibility of Results ,Half-life ,General Medicine ,Reference Standards ,Rats ,Solutions ,chemistry ,Area Under Curve ,Calibration ,Aristolochic Acids ,Indicators and Reagents ,Ammonium acetate ,Half-Life - Abstract
A sensitive, rapid and specific liquid chromatography-electrospray ionization-tandem mass spectrometry method was developed and validated for the determination of aristolochic acid-I (AA-I) in rat plasma. Finasteride was used as the internal standard (IS). The analyte was separated on a Zorbax Eclipse XDB-C(18) column by isocratic elution with methanol-10 mM ammonium acetate (75:25, v/v, pH = 7.3) at a flow rate of 0.25 mL/min, and analyzed by mass spectrometry in positive multiple reaction monitoring mode. The precursor-to-product ion transitions of m/z 359.0 --> 298.2 and m/z 373.1 --> 305.2 were used to detect AA-I and IS, respectively. Good linearity was achieved over a range of 0.4-600 ng/mL. Intra- and inter-day precisions measured as relative standard deviation were less than 13.5%, and accuracy ranged from 94.2 to 97.5%. The developed method was successfully applied in the pharmacokinetic study of AA-I in rats.
- Published
- 2009