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  • Title: An automated method for the simultaneous determination of pravastatin and its main metabolite in human plasma by high-performance liquid chromatography/atmospheric pressure chemical ionization mass spectrometry.
    Author: Kawabata K, Matsushima N, Sasahara K.
    Journal: Biomed Chromatogr; 1998; 12(5):271-5. PubMed ID: 9787898.
    Abstract:
    A new method for the determination of pravastatin, a potent inhibitor of 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase, and its main metabolite (R-416) in human plasma using high-performance liquid chromatography/atmospheric pressure (negative ion) chemical ionization mass spectrometry (LC/APCI-MS) is described. Pravastatin and R-416 in human plasma were isolated using solid phase extraction technique and analyzed by LC/APCI-MS. Selected ion monitoring was employed for selectivity and sensitivity, which enabled the quantification over a range of 0.625-80 mg/mL with acceptable precision and accuracy. No derivatization was required for these polar molecules. The retention times of the pravastatin, R-416 and the internal standard (R-1437) were 2.1, 2.5 and 3.9 min, respectively, with a total analysis time of 5 min. This method was validated and compared with the automated gas chromatography/negative ion chemical ionization mass spectrometry procedure.
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