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

Autor(es)

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

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: Food Chemistry; v. 352, AUG 1 2021.
• Citações Web of Science: 0

Resumo

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)

• Processo FAPESP: 19/13818-8 - Desenvolvimento de sensores descartáveis baseados em óxido de grafeno 3D, nanopartículas metálicas e polímeros molecularmente impressos para determinação de ácidos fenólicos em resíduos da fruticultura
• Beneficiário: Edervaldo Buffon
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 17/22401-8 - Fruto-refinaria: processos de obtenção, métodos de caracterização e geração de produtos oriundos de resíduos da fruticultura
• Beneficiário: Nelson Ramos Stradiotto
• Modalidade de apoio: Auxílio à Pesquisa - Temático