Application of the exploratory analysis of data in the geographical discrimination of okra of Rio Grande do Norte and Pernambuco

Francisco Santos Panero, Maria de Fátima Pereira Vieira, Ângela Maria Fagundes da Cruz, Maria de Fátima Vitória Moura

Abstract


The contents of Cu, Zn, Na, Fe, K, Ca, Mn, Mg, PO43-, Cl- and SO42- were determined in samples of okra of the municipal districts of Caruaru and Vitória de Santo Antão, in Pernambuco, as well as in the municipal districts of Ceará-Mirim, Macaíba and Extremoz in the state of Rio Grande do Norte. The objective of this work is the application of two methods of  exploratory analysis of data: Principal Component Analysis - PCA and Hierarquical Cluster Analysis - HCA in the geographical discrimination of okra originating in the states of Rio Grande do Norte and Pernambuco. The results showed that Cl- and Na were the main elements for the differentiation of the samples of Rio Grande do Norte and, the samples of Pernambuco presented the largest amount of Fe, Cu, Mn, Mg, Ca, Zn, K, PO43-, and SO42-. Boths the methods of exploratory analysis of data investigated are efficient for geographical discrimination of okra originating in Rio Grande do Norte and Pernambuco.


Keywords


análise exploratória de dados, quimiometria, PCA, HCA, quiabo, exploratory analysis, chemometrics, okra

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Orbital: The Electronic Journal of Chemistry (e-ISSN 1984-6428) is a quarterly scientific journal published by the Institute of Chemistry of the Universidade Federal de Mato Grosso do Sul, Brazil. Orbital is a peer-reviewed, open-access journal.