J. Electrochem. Sci. Eng.  

Analysis of sulfamethoxazole by square wave voltammetry using new carbon paste electrode

Izabel Cristina Eleotério, Marco Aantonio Balbino, José Fernando de Andrade, Bruno Ferreira, Adelir Aparecida Saczk, Leonardo Luiz Okumura, Antonio Carlos Ferreira Batista, Marcelo Firmino de Oliveira


In this work a new model of carbon paste electrode was employed to determine sulfamethoxazole (SMX), an antibiotic used to treat infections in human and veterinary medicine, by the square wave voltammetric modality (SWV). More specifically, the elec­trochemical behavior of SMX was investigated by cyclic voltammetry (CV), and the quantitative analysis of SMX was provided by SWV. The analytical curve was obtained with a linear correlation coefficient (r) of 0.985 and standard deviation (SD) of 0.005 μA. Limits of detection and quantification were found as 2.3×10-6 and 7.7×10-6 mol L-1, respectively. According to the obtained results, the new carbon paste prototype electrode can successfully be employed in this kind of electroanalytical applications.


Carbon paste electrode; Electroanalysis of pharmaceutical compounds; electrochemical sensors; voltammetric analysis

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DOI: http://dx.doi.org/10.5599/jese.583

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