Quantitative determination of Dapoxetine Hydrochloride and Tadalafil using different validated spectrophotometric methods

Maimana A Magdy; Basma H Anwar; Ibrahim A Naguib; Nessreen S Abdelhamid

doi:10.1016/j.saa.2019.117611

Quantitative determination of Dapoxetine Hydrochloride and Tadalafil using different validated spectrophotometric methods

Spectrochim Acta A Mol Biomol Spectrosc. 2020 Feb 5:226:117611. doi: 10.1016/j.saa.2019.117611. Epub 2019 Oct 9.

Authors

Maimana A Magdy¹, Basma H Anwar², Ibrahim A Naguib³, Nessreen S Abdelhamid¹

Affiliations

¹ Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Beni-Suef University, Alshaheed Shehata Ahmad Hegazy St, 62514, Beni-Suef, Egypt.
² Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Beni-Suef University, Alshaheed Shehata Ahmad Hegazy St, 62514, Beni-Suef, Egypt. Electronic address: bassma.hossam@hotmail.com.
³ Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Beni-Suef University, Alshaheed Shehata Ahmad Hegazy St, 62514, Beni-Suef, Egypt; Department of Pharmaceutical Chemistry, College of Pharmacy, Taif University, Al-Hawiah, 21974, Taif, Saudi Arabia.

PMID: 31606673
DOI: 10.1016/j.saa.2019.117611

Abstract

Three rapid, simple and selective spectrophotometric methods were developed for determination of Dapoxetine Hydrochloride (DAP) and Tadalafil (TAD) in bulk and pharmaceutical dosage forms. Method (A) is simultaneous first derivative (¹D) spectrophotometric method in which the peak amplitudes of the first derivative spectra (¹D) were measured for both DAP and TAD at 322.4 nm and 230 nm, respectively with no interference from each other. Method (B) is the area under curve (AUC) spectrophotometric method in which the areas under curve in the wavelength ranges 228-240 nm and 242-254 nm are used for determination of DAP and TAD respectively. Method (C) is ratio subtraction combined with extended ratio subtraction spectrophotometry (EXRS) in which TAD was determined by dividing the mixture spectra by the spectrum of 15 μg/mL solution of DAP, while DAP was be determined by dividing the mixture spectra by the spectrum of 30 μg/mL solution of TAD. The developed methods were applied to different laboratory prepared mixtures of DAP and TAD. These methods were validated according to the ICH guidelines with respect to linearity, accuracy, precision, selectivity and specificity, and can be used for routine quality control analysis of DAP and TAD in their dosage forms.

Keywords: Area under the curve; Dapoxetine hydrochloride; First derivative spectrophotometry; Ratio subtraction and extended ration subtraction; Tadalafil; UV spectrophotometry.