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-ILMCPE).
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 mM, with a detection
limit of 0.08 mM
