A Graphene-based Electrochemical Sensor for the Individual, Selective and Simultaneous Determination of Total Chlorogenic Acids, Vanillin and Caffeine in Food and Beverage Samples

Yiğit A., Alpar N., Yardım Y., Çelebi M., Senturk Z.

ELECTROANALYSIS, cilt.30, sa.9, ss.2011-2020, 2018 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 30 Sayı: 9
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1002/elan.201800229
  • Dergi Adı: ELECTROANALYSIS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED)
  • Sayfa Sayıları: ss.2011-2020
  • Anahtar Kelimeler: 5-O-Caffeoylquinic acid, Vanillin, Caffeine, Graphene modified glassy carbon electrode, Commercial food and beverage samples, SENSITIVE VOLTAMMETRIC DETERMINATION, STRIPPING VOLTAMMETRY, PASTE ELECTRODE, IONIC LIQUID, CARBON, COFFEE, NANOPARTICLES, NANOTUBES, PRODUCTS
  • Van Yüzüncü Yıl Üniversitesi Adresli: Evet

Özet

An electrochemical sensor based on the electrocatalytic activity of graphene (GR) was prepared, and used for the individual, selective and simultaneous determination of 5-O-Caffeoylquinic acid (5-CQA) that is major compound of chlorogenic acids in coffee, vanillin (VAN) and caffeine (CAF). The electrochemical behaviors of these compounds on GR modified glassy carbon electrode (GR/GCE) were investigated by cyclic voltammetry and square-wave adsorptive stripping voltammetry. By using stripping conditions after 30s accumulation under open-circuit voltage, the electrochemical oxidation peaks appeared at +0.53, 0.83 and 1.39V in phosphate buffer pH2.5, and good linear current responses were obtained with detection limits of 4.4x10(-9), 5.0x10(-7), and 3.0x10(-7)M for 5-CQA, VAN and CAF, respectively. The potential applicability of the proposed method was illustrated in commercial food and beverage samples.