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Simultaneous determination of atorvastatin, amlodipine, ramipril and benazepril in human plasma by LC-MS/MS and its application to a human pharmacokinetic study by Nageswara Rao Pilli; Jaswanth Kumar Inamadugu; Ramesh Mullangi; Vijaya Kumari Karra; Jayathirtha Rao Vaidya; J. V. L. N. Seshagiri Rao is a Chemistry article available to read on EtoBox.
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## Abstract A rapid, simple, sensitive and specific LC‐MS/MS method has been developed and validated for the simultaneous estimation of atorvastatin (ATO), amlodipine (AML), ramipril (RAM) and benazepril (BEN) using nevirapine as an internal standard (IS). The API‐4000 LC‐MS/MS was operated under the multiple‐reaction monitoring mode using electrospray ionization. Analytes and IS were extracted from plasma by simple liquid–liquid extraction technique using ethyl acetate. The reconstituted samples were chromatographed on C~18~ column by pumping 0.1% formic acid–acetonitrile (15:85, v/v) at a flow rate of 1 mL/min. A detailed validation of the method was performed as per the FDA guidelines and the standard curves were found to be linear in the range of 0.26–210 ng/mL for ATO; 0.05–20.5 ng/mL for AML; 0.25–208 ng/mL for RAM and 0.74–607 ng/mL for BEN with mean correlation coefficient of ≥0.99 for each analyte. The intra‐day and inter‐day precision and accuracy results were well with in the acceptable limits. A run time of 2.5 min for each sample made it possible to analyze more than 400 human plasma samples per day. The developed assay method was successfully applied to a pharmacokine
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- Author
- Nageswara Rao Pilli; Jaswanth Kumar Inamadugu; Ramesh Mullangi; Vijaya Kumari Karra; Jayathirtha Rao Vaidya; J. V. L. N. Seshagiri Rao
- Publisher
- John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0269-3879)
- Published
- 2011
- Language
- EN
- Field
- Chemistry (Physical Sciences)