Simultaneous electrochemical determination of acetaminophen and metoclopramide at electrochemically pre-treated disposable graphite pencil electrode

  • Shreekant M Patil P. G. Department of Studies in Chemistry, Karnatak University, Dharwad 580003
  • Vijay P Pattar P. G. Department of Studies in Chemistry, Karnatak University, Dharwad 580003
  • Sharanappa T Nandibewoor Karnatak University, Dharwad, India
Keywords: Acetaminophen, Metoclopramide, Voltammetry, Graphite Pencil electrode, Analytical applications

Abstract

A sensitive and economic voltammetric method was developed for the simultaneous determination of acetaminophen (AMP) and metoclopramide (MCP) using pre-treated graphite pencil electrode (PTGPE). Compared to a graphite pencil electrode, the pre-treated electrode showed an apparent shift of the oxidation potentials in the positive direction and a notable enhancement in the current responses for both AMP and MCP. Cyclic voltammetry (CV) was used to study the voltammetric behavior of the drugs, while differential pulse voltammetry (DPV) was used to determine AMP and MCP simulta­neously. The dependence of the current on scan rate, pH and concentration was investi­gated to boost the experimental conditions for simultaneous determination. The calibra­tion curves were obtained over the range of 0.1×10-7 to 1.1×10-7 M, the concentration of each of both the drugs was varied by keeping the other constant, and achieved lower detection limit of 3.25 nM for AMP and 1.16 nM for MCP. The developed method was found to be selective and rapid for the simultaneous determination of AMP and MCP. The proposed method was applied simultaneously in real samples and pharmaceutical samples, with satisfactory results.

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Published
30-09-2016
Section
Electrochemical Science