Fructose determination in fruit juices using an electrosynthesized molecularly imprinted polymer on reduced graphene oxide modified electrode

Author(s)

Pompeu Prado Moreira, Luiz Felipe ^{[1, 2]} ; Buffon, Edervaldo ^{[1, 2]} ; de Sa, Acelino Cardoso ^{[3, 1, 2]} ; Stradiotto, Nelson Ramos ^{[1, 2]}

Affiliation

^[1] Sao Paulo State Univ UNESP, Inst Chem, BR-14800060 Araraquara, SP - Brazil

^[2] Sao Paulo State Univ UNESP, Bioenergy Res Inst, BR-14800060 Araraquara, SP - Brazil

^[3] Univ Sao Paulo, Sao Carlos Inst Phys, BR-13566590 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: Food Chemistry; v. 352, AUG 1 2021.
• Web of Science Citations: 0

Abstract

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. (AU)

• FAPESP's process: 19/13818-8 - Development of disposable sensors based on 3D graphene oxide, metal nanoparticles and molecularly imprinted polymers for the determination of phenolic acids in fruticulture waste
• Grantee: Edervaldo Buffon
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 17/22401-8 - Fruit-refinery: obtention processes, characterization methods and generation of products derived from residues of the fruitculture
• Grantee: Nelson Ramos Stradiotto
• Support Opportunities: Research Projects - Thematic Grants