Fabrication of Fast and Sensitive Nanostructure Voltammetric Sensor for Determination of Curcumin in the Presence of Vitamin B9 in Food Samples
Abstract
A novel voltammetric sensor was used for the determination of curcumin by using cadmium oxide nanoparticles-ionic liquid (1,3-dipropylimidazolium bromide as a binder) modified carbon paste electrode (CdO-IL-MCPE). At pH 7.0 as an optimum electrochemical condition, the oxidation signals for curcumin and vitamin B9 are separated at ca. 0.41 and 0.73 V respectively; facilitating fast and sensitive analysis of curcumin in presence of vitamin B9. The oxidation signal of curcumin represented a linear relationship with the concentration of curcumin (R2=0.9981) in the range of 0.2–320.0 µM, with a detection limit of 0.08 µM.