Premium
A Graphene‐based Electrochemical Sensor for the Individual, Selective and Simultaneous Determination of Total Chlorogenic Acids, Vanillin and Caffeine in Food and Beverage Samples
Author(s) -
Yiğit Aydın,
Alpar Nurcan,
Yardım Yavuz,
Çelebi Metin,
Şentürk Zühre
Publication year - 2018
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201800229
Subject(s) - vanillin , detection limit , graphene , chlorogenic acid , electrochemistry , chemistry , stripping (fiber) , electrochemical gas sensor , cyclic voltammetry , voltammetry , electrode , nuclear chemistry , chromatography , inorganic chemistry , organic chemistry , materials science , nanotechnology , composite material
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 30 s accumulation under open‐circuit voltage, the electrochemical oxidation peaks appeared at +0.53, 0.83 and 1.39 V in phosphate buffer pH 2.5, and good linear current responses were obtained with detection limits of 4.4×10 −9 , 5.0×10 −7 , and 3.0×10 −7 M for 5‐CQA, VAN and CAF, respectively. The potential applicability of the proposed method was illustrated in commercial food and beverage samples.