Nuclear magnetic resonance applied to food analysis

International Conference on Food Chemistry & Hydrocolloids

August 11-12, 2016 Toronto, Canada

Elenilson Godoy Alves Filho

Federal University of Ceara, Brazil
Embrapa Agroind�ºstria Tropical, Brazil

Posters & Accepted Abstracts: J Exp Food Chem

Abstract :

The nuclear magnetic resonance (NMR) spectroscopy is widely used in food analysis driven by quality control since NMR is non-destructive technique and provides qualitative and quantitative information (by applying correct parameters) about the sample composition with little or no pre-treatment. NMR analysis provides information on a wide range of compounds present in the food matrix in a single experiment, offering advantages in terms of simplicity of sample preparation and short time of data acquisition. Nevertheless, due to highly complex NMR datasets from food matrices and the inherent similarity between the samples composition, applications of chemometric analysis to complement the analytical methods are necessary. In this context, NMR coupled to chemometrics was applied to differentiate conventional and transgenic common beans, grown in greenhouse or under the same field conditions. Another aim was to evaluate the effect of new non-thermal technologies (atmospheric cold plasma and ozone) in orange juice, and evaluate the different pasteurization conditions on passion fruit juice composition, both applied on the key compounds like sugars, amino acids and short chain organic acids. Additionally, the ultimate aim of the study was to apply a non-targeted NMR analysis to identify and investigate the variability of organic compounds in nine different cowpea seeds, without any complex pre-treatment. Finally, NMR combined to chemometric analysis was applied to understand the response mechanisms of orange trees when attacked by Xanthomonas axonopodis bacterium. Therefore, NMR data and chemometrics were suitable to reach all the aims proposed in these studies, providing comprehensive and quantitative information about different foodstuff matrices.

Biography :

Email: elenilson.godoy@yahoo.com.br