Simultaneous voltammetric determination of vanillin and caffeine in food products using an anodically pretreated boron-doped diamond electrode: Its comparison with HPLC-DAD

Alı H. S., Abdullah A. A., Talay Pınar P., Yardım Y., Şentürk Z.

TALANTA, vol.170, pp.384-391, 2017 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 170
  • Publication Date: 2017
  • Doi Number: 10.1016/j.talanta.2017.04.037
  • Journal Name: TALANTA
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.384-391
  • Keywords: Vanillin, Caffeine, Simultaneous voltammetric determination, Anodically pretreated boron-doped diamond electrode, High-performance liquid chromatography, Commercial food and beverage samples, GLASSY-CARBON ELECTRODE, STRIPPING VOLTAMMETRY, ELECTROCHEMICAL DETERMINATION, ACETYLSALICYLIC-ACID, BEVERAGE SAMPLES, PASTE ELECTRODE, SENSOR, PARACETAMOL, EXTRACTION, NANOTUBES
  • Van Yüzüncü Yıl University Affiliated: Yes


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 60 s accumulation under open-circuit voltage, method allowed simultaneous determination of VAN and CAF in phosphate buffer, pH 2.5, with detection limits of 0.234 g (1.54x10(-6) M) and 0.071 mu g mL(-1) (3.66x10(-7)M), respectively. The proposed method was successfully applied in the selective and simultaneous determination of VAN and CAF in commercial food and beverage samples. In addition, for the comparison, high-performance liquid chromatographic method with diode-array detection was developed for the first time for their simultaneous determination.