期刊
FOOD CHEMISTRY
卷 352, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2021.129430
关键词
Fructose; Fruit juices; Phenylboronic acid; Molecularly imprinted polymer; Reduced graphene oxide; Electrochemical sensor
资金
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [2017/22401-8, 2019/13818-8]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [162425/2015-5]
- Coordenacao de Aperfeicoamento de Pessoal de Ensino Superior (CAPES-FCT) [88887.375050/2019-00]
This study introduces a novel electrochemical sensor for selective detection of fructose, achieving accurate quantification in various fruit juices.
The present work reports the development of a novel electrochemical sensor for the selective detection of fructose. The sensor was developed through electropolymerization of a molecularly imprinted polymer film on a reduced graphene oxide modified electrode. The modified electrode was characterized by cyclic voltammetry, electrochemical impedance spectroscopy, scanning electron microscopy, atomic force microscopy and RAMAN spectroscopy. Through the application of the modified electrode, the recognition of fructose molecules occurred in a concentration range of 1.0 x 10-14 to 1.0 x 10-11 mol L-1, under a Langmuir adsorption isothermal model. The sensitivity and limits of detection and quantification obtained for the sensor were 9.9 x 107 A L mol-1, 3.2 x 10-15 mol L-1 and 1.1 x 10-14 mol L-1, respectively. The analytical method used for the detection of fructose presented good reproducibility, stability and accuracy, and was successfully applied for the quantification of this sugar in orange, apple and grape juices.
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