Voltammetric Determination of Allura Red AC onto Carbone-Paste Electrode Modified by Silica with Embedded Cetylpyridinium Chloride

In current study the carbon-paste electrode modified by silica with embedded cetylpyridinium chloride for determination of Allura Red AC have been developed. The optimal conditions were determined to be for the square-wave voltammetric quantification: pH=2, E-ads=300 mV, t(ads)=300 s, amplitude - 40 mV, frequency - 25 Hz and potential scan rate is 250 mV sec(-1). The calibration plot has linearity in the concentration ranges 0.04-0.2 mu M and 0.2-1.00 mu M. The LOD and LOQ are equal to 0.005 mu M and 0.015 mu M respectively. The crafted sensor has been applied successfully to model solutions and in jelly candies analysis with RSD no more than 10 %.

Automated summary

The study developed a modified carbon-paste electrode for the determination of Allura Red AC, with optimal detection conditions determined for square-wave voltammetric quantification. The calibration plot showed good linearity and the LOD and LOQ were also determined. The crafted sensor was successfully applied in model solutions and jelly candies analysis with RSD no more than 10%.