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Talanta

Title:		Volatile profiles of green Spanish-style table olives: Application of compositional data analysis for the segregation of their cultivars and production areas
Author(s):		Garrido-Fernandez A; Montano A; Sanchez-Gomez AH; Cortes-Delgado A; Lopez-Lopez A;
Address:		"Departamento de Biotecnologia de Alimentos, Instituto de la Grasa (CSIC), Campus Universitario Pablo de Olavide, Edificio 46, Ctra. Utrera km 1, 41013 Sevilla, Spain. Departamento de Biotecnologia de Alimentos, Instituto de la Grasa (CSIC), Campus Universitario Pablo de Olavide, Edificio 46, Ctra. Utrera km 1, 41013 Sevilla, Spain. Electronic address: all@cica.es"
Journal Title:		Talanta
Year:		2017
Volume:		20170322
Issue:
Page Number:		77 - 84
DOI:		10.1016/j.talanta.2017.03.066
ISSN/ISBN:		1873-3573 (Electronic) 0039-9140 (Linking)
Abstract:		"The work presents the application of compositional data methodology to analytical results, taking as an example the study of the volatile profiles of green Spanish-style table olives according to cultivars and production areas. For this purpose, the volatile compounds (analysed by GC-MS and expressed as percentages of the total area) were considered as a compositional data set in the Simplex space and, as a result, analysed by their specific new statistical tools. Application of compositional exploratory tools (variation array, tertiary graphs, biplots, or coda-dendrogram) allowed differentiating cultivars and production areas based on their volatile profiles. Also, the application of Cluster and Principal Component analysis to the ilr transformed values (coordinates), following the new methodology, led to more realistic results than the formally incorrect implementation of the standard multivariate analysis (developed for data from the Euclidean space) to percentages (data in the Simplex). Therefore, the work presents a novel consideration of the volatile profiles of table olives as compositional data and shows their proper analysis by statistical tools specifically developed for them"
Keywords:		Agriculture/*standards Gas Chromatography-Mass Spectrometry/*methods Humans Olea/chemistry/classification/*growth & development/*metabolism Principal Component Analysis Volatile Organic Compounds/*analysis Compositional data analysis Fermentation Green ta;
Notes:		"MedlineGarrido-Fernandez, A Montano, A Sanchez-Gomez, A H Cortes-Delgado, A Lopez-Lopez, A eng Netherlands 2017/04/17 Talanta. 2017 Jul 1; 169:77-84. doi: 10.1016/j.talanta.2017.03.066. Epub 2017 Mar 22"