boron and vanillin

This paper describes an electroanalytical method for the simultaneous determination of vanillin (VAN) and caffeine (CAF) using an anodically pretreated boron-doped diamond electrode. Selective determination of one compound in the presence of other one was also realized. Both compounds yielded a single irreversible oxidation peak using cyclic voltammetry. The nature of the electrode reaction was found to be diffusion controlled with contribution of adsorption. By using square-wave adsorptive stripping voltammetry after 60s accumulation under open-circuit voltage, method allowed simultaneous determination of VAN and CAF in phosphate buffer, pH 2.5, with detection limits of 0.234µgmL

Topics: Antioxidants; Benzaldehydes; Beverages; Boron; Caffeine; Central Nervous System Stimulants; Chromatography, High Pressure Liquid; Diamond; Electrochemical Techniques; Electrodes; Food Analysis; Limit of Detection