DETERMINATION OF PARACETAMOL BY SQUARE WAVE VOLTAMPEROMETRY USING A PLATINUM ELECTRODE

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Hugo Romero B.
https://orcid.org/0000-0002-7846-0512
Dayana Benalcazar R.
https://orcid.org/0000-0002-5267-5144

Abstract

The application of square wave voltammetry (SWV for its acronym in English) was studied for the quantification of paracetamol (PAR) using a platinum electrode as a working electrode. The reliability of the method was determined by determining analytical parameters such as the limit detection, limit of quantification and percentage of recovery. The electrochemical behavior of PAR was evaluated from acetate and phosphate buffer solutions, at pH levels between 4 and 6 in a potential range of +0 to +2 V vs Ag/AgCl, at a scanning speed of 50 mVs-1 by cyclic voltammetry (VC). The appearance of the anodic peak of the analyte occurred at a potential of 0.6 V. The analytical parameters were optimized, finding better electrochemical responses at a frequency of 10 Hz with a pulse width of 100 mV and a scan increment of 10 mV. The detection and quantification limits obtained were 0.6 mM and 2.0 mM, respectively. The PAR recovery percentage ranged from 96.97 to 104.54 %. Finally, the application of this technique is a reliable, simple, and fast alternative.

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Section
Cientific papers
Author Biography

Hugo Romero B., Universidad Técnica de Machala

Hugo Romero es Docente de la carrera de Ingeniería Química de la Universidad Técnica de Machala, Ecuador

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