a b s t r a c t
A method for the determination of food additive vanillin was developed by adsorptive stripping voltammetry.
Its determination was carried out at the anodically pre-treated boron-doped diamond electrode in
aqueous solutions.
Using square-wave stripping mode, the compound yielded a well-defined voltammetric
response in phosphate buffer, pH 2.5 at +1.14 V (vs. Ag/AgCl) (a pre-concentration step being carried
out at open-circuit condition for 60 s).
A linear calibration graph was obtained in the concentration range
of 0.5–15.0 lgmL1 (3.3 106–9.8 105 mol L1) with a detection limit of 0.024 lgmL1
(1.6 107 mol L1). As an example, the practical applicability of the proposed method was tested for
the determination of this flavouring agent in commercial pudding powder of Keshkule (Turkish milk pudding
with almond flour).