Simultaneous voltammetric determination of vanillin and caffeine in food products using an anodically pretreated boron-doped diamond electrode: Its comparison with HPLC-DAD
TALANTA, cilt.170, ss.384-391, 2017 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 170
- Basım Tarihi: 2017
- Doi Numarası: 10.1016/j.talanta.2017.04.037
- Dergi Adı: TALANTA
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.384-391
- Anahtar Kelimeler: 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 Üniversitesi Adresli: Evet
Özet
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.