Determining the geographical origin of Sechium edule fruits by multielement analysis and advanced chemometric techniques
Fecha
2016Autor
Hidalgo, Melisa Jazmín
Fechner, Diana Corina
Marchevsky, Eduardo Jorge
Pellerano, Roberto Gerardo
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This paper describes the determination and evaluation of the major and trace element composition (Al,
As, Ba, Ca, Cd, Co, Cu, Fe, K, Mg, Mn, Na, Pb, Sr and Zn) of Sechium edule (Jacq) Swartz fruits collected from
four different places of production in Corrientes province, Argentina. Element concentrations were determined
by using inductively coupled plasma optical emission spectrometry (ICP OES) after microwave
digestion. The accuracy was confirmed with standard reference material of spinach leaves (NIST,
1570a) and spiking tests. Principal component analysis (PCA), linear discriminant analysis (LDA), knearest
neighbors (kNN), partial least square-discriminant analysis (PLS-DA) and support vector machine
(SVM) were applied to the results for discriminating the geographical origin of S. edule fruits. Finally, the
LDA method was found to perform best with up to 90% accuracy rate based on the following elements: Ca,
Ba, Cu, Mn, Na, Sr, and Zn.
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