title: Development and validation of a high-throughput and robust LC-MS/MS with electrospray ionization method for simultaneous quantitation of oseltamivir phosphate and its oseltamivir carboxylate metabolite in human plasma for pharmacokinetic studies.
abstract: A rapid, sensitive and rugged solid-phase extraction ultraperformance liquid chromatography tandem mass spectrometry (LC-MS/MS) method was developed for determination of oseltamivir phosphate (OP) and oseltamivir carboxylate (OC) in human plasma. The procedure for sample preparation includes a simple SPE extraction procedure coupled with a Chromatopack C(18) column (50 × 3.0 mm, i.d., 3.0 µm) with isocratic elution at a flow-rate of 0.600 mL /min and acyclovir was used as the internal standard. The analysis was performed on a triple-quadrupole tandem mass spectrometer by multiple reaction monitoring mode via electrospray ionization. Using 500 µL plasma, the methods were validated over the concentration ranges 0.92-745.98 and 5.22-497.49 ng/mL for OP and OC, with a lower limit of quantification of 0.92 and 5.22 ng/mL. The intra- and inter-day precision and accuracy of the quality control samples were within 10.1%. The recovery was 68.72, 70.66 and 71.59% for OP, OC and IS, respectively. Total run time was only 1.0 min. The method was highly reproducible with excellent chromatography properties.
authors.affiliation: Department of Pharmacology, LM College of Pharmacy, Gujarat University, Ahmadabad, India. drravikanneti@gmail.com
authors.forename: Ravi
authors.initials: R
authors.lastname: Kanneti
authors.forename: Dasandi
authors.initials: D
authors.lastname: Bhavesh
authors.forename: Dharmesh
authors.initials: D
authors.lastname: Paramar
authors.forename: Shivaprakash
authors.initials: S
authors.lastname: R
authors.forename: Parloop A
authors.initials: PA
authors.lastname: Bhatt
mesh_terms: D002853:Chromatography, Liquid / Q000379:methods*; D004355:Drug Stability; D006801:Humans; D016018:Least-Squares Analysis; D053139:Oseltamivir / Q000031:analogs & derivatives* / Q000097:blood* / Q000493:pharmacokinetics; D010710:Phosphates / Q000097:blood / Q000493:pharmacokinetics; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D021241:Spectrometry, Mass, Electrospray Ionization; D053719:Tandem Mass Spectrometry / Q000379:methods*
chemical_list: D010710:Phosphates; D053139:Oseltamivir; C535162:oseltamivir carboxylate