%0 Journal Article
%T Simultaneous Voltammetric Determination of Gallic and Protocatechuic Acids in Mango Juice Using a Reduced Graphene Oxide-Based Electrochemical Sensor
%A Ahmed Bakr
%A Emad F. Newair
%A Fran£¿ois Garcia
%A Refat Abdel-Hamid
%J -
%D 2019
%R https://doi.org/10.3390/beverages5010017
%X Abstract A simple and sensitive reduced graphene oxide-modified glassy carbon electrode-based electrochemical sensor was used for the concomitant determination of gallic acid (GA) and protocatechuic (PA) acid. The prepared sensor showed a significant enhancement in synergetic electro-catalytic performance towards GA and PA oxidation. A good resolution of the voltammetry peaks was obtained and a method of square wave voltammetry was developed for detection. The modified electrode was characterized by electrochemical techniques. The optimal experimental parameters were considered. GA and PA exhibited a linear increase in the peak currents with their concentrations in the range from 20 to 144 ¦̀mol¡¤L£¿1 for GA and from 20 to 166 ¦̀mol¡¤L£¿1 for PA, with limits of detection (S/N = 3) of 30.8 ¦̀mol¡¤L£¿1 for GA and 10.2 ¦̀mol¡¤L£¿1 for PA. The sensor applicability was simultaneously tested for the analytical determination of GA and PA in mango juice and exhibited a robust functionality. View Full-Tex
%K voltammetry
%K reduced graphene oxide
%K electrochemical sensor
%K phenolic acids
%K mango juice
%U https://www.mdpi.com/2306-5710/5/1/17