identificazione dell'origine di concentrato di pomodoro mediante tecniche NMR e chemiometriche

In this work, 1H NMR spectroscopy, combined with multivariate statistical protocols, was applied to discriminate geographical origin of triple concentrated tomato paste from Italy and from China. Notwithstanding different tomato cultivars and ripening stages were employed for obtaining the final product, a clear geographical differentiation was achieved by performing simply a PCA analysis. Citrate content resulted to be the most relevant chemical compound for samples differentiation but also excluding this compound, a clear discrimination of samples coming from the two countries was achieved by performing OPLS-DA. This latter model indicated aspartate, glutamine and sugars as important variables for the geographical discrimination.