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Published on: May 23, 2018
Determination of vanillin in commercial food product by adsorptive stripping voltammetry using a boron-doped diamond
Yavuz Yardım1, Mehmet Gülcan, Zühre Şentürk
1Yüzüncü Yıl University, Faculty of Science, Department of Analytical Chemistry, Van 65080, Turkey. yavuzyardim2002@yahoo.com
Abstract:
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 60s). A linear calibration graph was obtained in the concentration range of 0.5-15.0 μg mL(-1) (3.3×10(-6)-9.8×10(-5) mol L(-1)) with a detection limit of 0.024 μg mL(-1) (1.6×10(-7) mol L(-1)). 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).
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