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Interaction pyrogallol red (RP) on glassy carbon electrode surface modified gold film (AUF) and cysteamine (cis) was studied. Bearing in mind the order of the modification, it was found that the response of oxidation of RP showed higher current to the electrode modified with gold film electro-deposited on cysteamine glassy carbon (GC/Cis /AuF/E), which allows the RP oxidation potential of 0.48 V at pH 3.25. Electrochemical devices, such as pH, scan rate (Ʋ), adsorption potential (Eads) and adsorption time (tads) parameters were optimized to yield values: pH 3.25; Ʋ 75.50mV s-1; Eads0.10 V and tads60 s respectively. The calibration curve linearity reached a range between 2.00 x 10-7and 15.14x10-7mol L-1. The detection limit (3S/m) was 1.20 x 10-7mol L-1 and relative standard deviation for measurements of seven equal RP 5.0 x 10-4mol L-1 was 1.01%.

revista de la sociedad química del perú/revista de la sociedad química del perú

DETERMINACIÓN DE ROJO DE PIROGALOL USANDO UN ELECTRODO DE CARBONO VÍTREO MODIFICADO CON PELÍCULA DE ORO Y CISTEAMINA POR VOLTAMPEROMETRÍA DE ADSORCIÓN (AdSV). POSIBLE USO COMO SENSOR ELECTROQUÍMICO