Quantitative Analysis of Irbesartan in Pharmaceuticals and Human Biological Fluids by Voltammetry

Abstract

A differential pulse (DP) and square wave (SW) voltammetric techniques were developed for the determination of irbesartan. The electrochemical behavior of irbesartan was investigated by cyclic voltammetry (CV), differential pulse voltammetry (DPV), and square wave voltammetry (SWV) at the hanging mercury drop electrode (HMDE). Different parameters were tested to optimize the conditions of the determination. It was found that in the range of 8 × 10⁻⁶–1 × 10⁻⁴ M, the currents measured by both of methods presented a good linear property as a function of the concentration of irbesartan. In addition, validation parameters, such as reproducibility, sensitivity, and recovery were evaluated as well. The slope of the log Ip- log ν linear plot was 0.58 indicating the diffusion control for 0.5 M sulphuric acid without the need for separation or complex sample preparation, since there was no interference from the excipients and endogenous substances.

The methods were successfully applied to the analysis of irbesartan in the pharmaceutical tablet formulations and in human serum samples.

Keywords:

• Drug analysis
• hanging mercury drop electrode
• human serum
• irbesartan
• voltammetry

This research was supported by a Grant from Ankara University Scientific Research Project Foundation (Grant no: 20030803043) for Dr. Bengi Uslu. The authors would like to thank Sanofi-Synthelabo Pharm. Ind Company (Istanbul, Turkey) for providing standard irbesartan hydrochloride and commercial tablets for developing the proposed methods.