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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Differentiation of cocoa nibs from distinct origins using comprehensive two-dimensional gas chromatography and multivariate analysis

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Autor(es):
Oliveira, Luciana F. ; Braga, Soraia C. G. N. ; Augusto, Fabio ; Hashimoto, Juliana C. ; Efraim, Priscilla ; Poppi, Ronei J.
Número total de Autores: 6
Tipo de documento: Artigo Científico
Fonte: Food Research International; v. 90, p. 133-138, DEC 2016.
Citações Web of Science: 13
Resumo

Headspace solid-phase microextraction (HS-SPME) combined with comprehensive two-dimensional gas chromatography was used for identification of volatiles compounds responsible for differentiation between cocoa nibs from Brazil and Ivory Coast. The unfolded GC x GC with Flame Ionization Detector (FID) chromatograms were first aligned using the correlation optimization warping (COW) algorithm and normalized. After that, Fisher ratio was calculated for each variable, and a threshold value was chosen-to select the variables that best promote a separation of nibs samples from different sources in a principal component analysis (PCA) model. To identify the relevant compounds for the separation, representative samples of each source were analyzed in the same conditions by GC x GC with detection by quadrupole mass spectrometry. Finally, the average peak volumes for each key compound obtained for both classes were compared using a Student t-test and it was possible to identify 15 volatile compounds responsible for differentiation between cocoa nibs from Brazil and Ivory Coast. (C) 2016 Elsevier Ltd. All rights reserved. (AU)

Processo FAPESP: 12/14695-8 - Emprego de métodos quimiométricos em análises por cromatografia gasosa bidimensional abrangente para avaliação de cacau, seus derivados e alfarroba
Beneficiário:Luciana Fontes de Oliveira
Linha de fomento: Bolsas no Brasil - Doutorado