PCA and HCA analyses applied to 1H NMR spectra of aguardentes allowed to discriminate the different types of such samples. However, adulterated and different types of honeys were discriminated. Honeys from different Brazilian regions could not be discriminated since they showed very similar characteristics. KNN, SIMCA and PLS-DA methods were suitable for classification of commercial honeys from this state. Moreover, honeys, which showed anomalous behaviour, were discriminated due to citric acid and HMF presence. Chemometrics applied to 1H NMR spectra data allowed the discrimination among honeys from eucalyptus, citrus and wildflowers, which were produced in São Paulo state. For banana, peach, coconut and pineapple commercial samples (from C3 plants), (2H/1H)I values were similar to those of sugarcane aguardentes.

(2H/1H)I data of honey aguardentes were similar to those of C3 plants. Aguardentes from CAM plants (pineapple) showed intermediate values. In aguardentes analysis, a discrimination of approximately 12 ppm between those from C3 (grape, banana and cassava) and C4 (sugarcane and maize) plants was also observed. Some commercial samples presented (2H/1H)I values near those determined for sugarcane honeys. C3 plants showed (2H/1H)I values near 100 ppm (parts per million) and from C4 plants showed higher values, in approximately 12 ppm. In honeys analysis, was observed a good discrimination between those produced by C3 plants (eucalyptus, citrus, assa-peixe, Jataí and wildflowers) and those from C4 plants (sugarcane). Using SNIFNMR technique, it was observed that the isotopic ratio of the methyl group from ethanol (2H/1H)I is related to the biosynthetic origin of carbohydrates produced by plants (C3, C4 and CAM mechanisms used to CO2 fixation). The present work describes the use of SNIF-NMR technique and chemometric methods applied to 1H NMR data aiming to evaluate chemical differences that are related to samples authenticity. Therefore, the quality control of these products is essential. Productive chain of aguardentes has also risen, and both products are considerably important in Brazilian agribusiness. Utilização da RMN aliada a métodos quimiométricos na análise de méis e aguardentes Detalhes bibliográficos Autor(a) principal:Īpiculture has been increasing a lot in the last years in Brazil, which already is one of the greatest exporters of honey.

Espectro rmn etanol