Métodos eletroanalíticos e ensaios de atividade antioxidante no controle de qualidade de mel

• Ano de defesa: 2015
• Autor(a) principal: Rezende, Stefani Garcia
• Orientador(a): Gil, Eric de Souza
• Banca de defesa: Gil, Eric de Souza, Oliveira, Severino Carlos Bezerra, Santos, Wallans Torres Pio dos
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Goiás
• Programa de Pós-Graduação: Programa de Pós-graduação em Ciências Farmacêuticas (FF)
• Departamento: Faculdade Farmácia - FF (RG)
• País: Brasil
• Palavras-chave em Português: Antioxidante em mel; Voltametria de pulso diferencial; Hidroximetilfurfural; Atividade diastásica; Quimiometria
• Palavras-chave em Inglês: Antioxidant in honey; Differential pulse voltammetry; Hidroxymethtlfurfural; Diastatic activity; Chemometrics
• Área do conhecimento CNPq: CIENCIAS BIOLOGICAS::FARMACOLOGIA
• Link de acesso: http://repositorio.bc.ufg.br/tede/handle/tede/4996

The honey is a concentrated source of nutrients, it is used by animals and exploited as a natural resource for homes since antiquity. Many studies have tried to characterize the honey and its quality, but the complex natural process of production, involve that any research is not able to obtain fully satisfactory results. In this work 24 samples. Were studied 24 samples from honey producing regions located around Goiania - GO and some foreign samples (Portugual, USA and New Zelândias), those donated by the Beekeeping Association of the State of Goiás and these purchased in specialty stores in their respective countries . The physical and chemical tests as indicative of deterioration, hydroxymethylfurfural (HMF) and diastase activity (AD), followed parameters proposed by Normative Instruction N. 11/2000 of the Ministry of Agriculture, Livestock and Supply (MAPA). The antioxidant components analysis was used for traditional spectroscopic methods Folin-Ciocalteu (FC), Ferric Reducing Antioxidant Potential (FRAP), 2,2-diphenyl-1-picryl-hydrazyl (DPPH●); and electroanalytical calculated from the oxidation peaks voltammetric differential pulse (DPV) by Electrochemical Index (EI). While mid-infrared method (IR) and methods of multivariate statistical analysis were used for identification and classification of honey from different floral sources and/or regions. As for the deterioration analysis test (HMF and AD) 50% of the samples applied in these tests, for the control of physical and chemical quality, were at odds with the Normative Instruction N. 11/2000 of MAPA. All samples showed the presence of antioxidant compounds exposed by methods FC, FRAP, DPPH● and EI; and the method of FRAP was the one closest to the EI and the DPPH● was inversely proportional to EI, which may conclude that the electroanalytical by DPV is suitable for analysis of antioxidant compounds in honey. The infrared results coupled with chemometric tool, principal component analysis (PCA) and hierarchical cluster analysis (HCA), were not satisfactory for sample groups of the same floral origin and/or region, but suggested trend in results.