alexa Simultaneous Estimation of Fluoxetine and Norfluoxetine
ISSN: 0975-0851

Journal of Bioequivalence & Bioavailability
Open Access

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Research Article

Simultaneous Estimation of Fluoxetine and Norfluoxetine in Plasma by RP-HPLC Employing Pre-Column Derivatization for UV-Sensitivity Enhancement

Smita T Kumbhar1, Kundan B Ingale2, Prafulla B Choudhari2and Manish S Bhatia2*

1Department of Pharmaceutical Chemistry, D.S.T.S. Mandal’s College of Pharmacy, Solapur-413004, Maharashtra, India

2Department of Pharmaceutical Chemistry, Bharati Vidyapeeth College of Pharmacy, Near chitranagri, Kolhapur.416013, Maharashtra, India

*Corresponding Author:
Dr. Manish S Bhatia
Department of Pharmaceutical Chemistry
Bharati Vidyapeeth College of Pharmacy
near chitranagri, Kolhapur
416013, Maharashtra, India
E-mail: [email protected]

Received Date: April 21, 2012; Accepted Date: June 07, 2012; Published Date: June 09, 2012

Citation: Kumbhar ST, Ingale KB, Choudhari PB, Bhatia MS (2012) Simultaneous Estimation of Fluoxetine and Norfluoxetine in Plasma by RP-HPLC Employing Pre-Column Derivatization for UV-Sensitivity Enhancement. J Bioequiv Availab S14:008 . doi: 10.4172/jbb.S14-008

Copyright: © 2012 Kumbhar ST, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 

Abstract

A rapid high-performance liquid chromatographic method is described for the simultaneous estimation of the widely used antidepressant drug, fluoxetine and its principal metabolite norfluoxetine in human plasma. Pre-column derivatization of norfluoxetine was done using 4-dimethylaminobenzaldehyde (PDAB) to overcome the limitations of sensitivity of norfluoxetine. After liquid-liquid extraction the separation of analytes and internal standard from endogenous matrix interference was achieved using a reversed-phase HIQ sil ODS column (250 mm length x 4.6 mm internal diameter) KYA TECH (Japan) and assayed by ultraviolet absorption at 227 nm. The isocratic mobile phase (1 ml/min.) consisting of acetonitrile: water: triethylamine: 0.01 M Orthophospheric acid (O.P.A.) (70:30:0.5:2) was used to separate fluoxetine, norfluoxetine and the internal standard, nebivolol. The relative retention times were 2.49, 4.24 and 7.29 min for norfluoxetine, fluoxetine and nebivolol, respectively. Chromatographic run time was 10 min and peak area ratios of analytes to IS were used for regression analysis of calibration curve. Linearity was obtained over the concentration range 10-60 μg/ml for both substances. The mean % recovery ± SD was found to be 101.23% ± 1.0 and 100.69 ± 0.67 for fluoxetine and norfluoxetine respectively. The method seems suitable, in terms of accuracy and precision, for the determination of fluoxetine plasma levels of patient; furthermore, it is rapid and sensitive.

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