MWCNT-modified Electrode for Voltammetric Determination of Allura Red and Brilliant Blue FCF in Isotonic Sport Drinks

Sierra-Rosales P.; Toledo-Neira C.; Ortúzar-Salazar P.; SQUELLA, J. A.

Abstract

A fast and simple electrochemical sensor is presented for the determination of allura red and brilliant blue in isotonic sport drinks, using a glassy carbon electrode modified with multi-walled carbon nanotubes. The electrochemical behavior of the colorants was studied by cyclic and differential pulse voltammetry in 0.1 M PBS, pH 7.0. The solution pH, the amount of nanomaterial on the surface of the electrode and the accumulation time of each colorant were optimized. Under the optimal conditions, the sensor exhibited a linear response to allura red and brilliant blue with detection limits of 7 mu g L-1 and 52 mu g L-1, respectively. The sensor was applied to the analysis of commercial isotonic sports drinks that contain individual or mixed colorants, showing good sensitivity and reproducibility. The results were compared with a chromatographic method showing that the levels of colorants are low and did not show a risk for a consumer's health.

Más información

Título según WOS: MWCNT-modified Electrode for Voltammetric Determination of Allura Red and Brilliant Blue FCF in Isotonic Sport Drinks
Título según SCOPUS: MWCNT-modified Electrode for Voltammetric Determination of Allura Red and Brilliant Blue FCF in Isotonic Sport Drinks
Título de la Revista: ELECTROANALYSIS
Volumen: 31
Número: 5
Editorial: WILEY-V C H VERLAG GMBH
Fecha de publicación: 2019
Idioma: English
DOI:

10.1002/elan.201800786

Notas: ISI, SCOPUS