NMR and multivariate data analysis to assess traceability of argentine citrus

SALAZAR, MARIO O.; PISANO, PABLO L.; GONZÁLEZ SIERRA, MANUEL; FURLAN, RICARDO L.E.

MICROCHEMICAL JOURNAL

ELSEVIER SCIENCE BV

Año: 2018 vol. 141 p. 264 - 270

0026-265X

Argentine citrus industry stands out among the top ten largest producers of citrus of the world. Traceability is akey point of the quality control in the international trade context. Discrimination between orange juices producedfrom different geographical regions in Argentina (San Pedro and Entre Ríos), has been achieved by applyingprincipal components analysis (PCA) and partial least-squares ? discriminant analysis (PLS?DA) to 1HNMR spectra of the juices. Different regions of the spectra were analyzed in view of the large range of signalintensities and the chemometric treatment of the NMR data has successfully distinguished the juice of differentorigins/varieties, as well as the metabolites responsible for their separation. Examination of the PCA loadingsshowed that citric acid and ethanol levels were the main chemical variables for sample discrimination.