Abstract

This work presented a particular electrochemical sensor for analysis of amaranth, an azo toxic dye. A graphite nitride carbon (g-C3N4) was used to modify an electro-treated screen-printed electrode (g-C3N4/SPE) for electroanalysis of amaranth. Physicochemical characteristics and analytical performance of g-C3N4/SPE were investigated by relevant equipment. The g-C3N4/SPE when comparing with bare SPE, possessed an impressive electrocatalytic performance towards the amaranth oxidation. As-developed sensor under the optimal circumstances exhibited an extended linear response range for different amaranth concentrations of 0.08 mu M-340.0 mu M, with a narrow practical limit of detection (LOD) of 0.02 mu M, a limit of quantification (LOQ) of 0.08 mu M, and an unparalleled sensitivity of 0.0702 mu A/mu M using differential pulse voltammetry (DPV). The applicability of as fabricated sensor was verified by determining the amaranth in real samples, with acceptable recoveries.