Abstract
A highly sensitive sensor based on a carbon paste electrode modified with a CdO nanoparticle and 1-methyl-3-butylimidazolium bromide was used for the voltammetric analysis of vitamin C in the presence of nicotin amide adenine dinucleotide. The highly sensitive sensor shows excellent enhancement and electrocatalytic activity towards vitamin C. The variation of pH shows the number of protons is equal to number of electrons for vitamin C electrooxidation. The electrooxidation peak current of vitamin C and nicotin amide adenine dinucleotide increased linearly with their concentration in the ranges of 0.07–480μmolL−1 vitamin C and 0.5–700μmolL−1 nicotin amide adenine dinucleotide. The limits of detection for vitamin C and nicotin amide adenine dinucleotide were 0.03μmolL−1 and 0.1μmolL−1, respectively. Simultaneous determination of vitamin C and nicotin amide adenine dinucleotide was investigated by using the square wave voltammetry technique. The proposed sensor showed good stability, sensitivity, selectivity, and reproducibility and can be used for some important food sample analyses.
In this study, we describe first report for application ionic liquid modified nanoparticle carbon paste electrode for simultaneous determination of vitamin C and NADH in real samples. [Display omitted]
•The electrochemical behavior of vitamin C was studied using modified carbon paste electrode.•Synthesis and application of CdO/NPs as novel sensors for vitamin C determination•This sensor is also used for the determination of vitamin C in real samples.•The sensor resolved the overlap response of vitamin C and NADH.