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J Sci Food Agric

Title:		A new FT-IR method combined with multivariate analysis for the classification of vinegars from different raw materials and production processes
Author(s):		Guerrero ED; Mejias RC; Marin RN; Lovillo MP; Barroso CG;
Address:		"Analytical Chemistry Department, Faculty of Sciences, University of Cadiz, P.O. Box 40, E- 11510, Pol. Rio San Pedro, Puerto Real, Cadiz, Spain. enrique.duranguerrero@uca.es"
Journal Title:		J Sci Food Agric
Year:		2010
Volume:		90
Issue:		4
Page Number:		712 - 718
DOI:		10.1002/jsfa.3873
ISSN/ISBN:		1097-0010 (Electronic) 0022-5142 (Linking)
Abstract:		"BACKGROUND: Due to the diversity of vinegars on the market and the increase in demand, it is considered necessary to investigate and establish criteria for classifying them in order to obtain more information concerning their real origin. New spectroscopic techniques such us mid-infrared spectroscopy with Fourier transform (FT-IR) are capable of providing information in relation to these aspects. FT-IR combined with multivariate analysis has been used to classify vinegars according to the raw materials and production processes (with or without ageing in wood). Principal component analysis (PCA), partial least-squares discriminant analysis regression (PLS-DA) and stepwise linear discriminant analysis (SLDA) were used. RESULTS: The results obtained have been compared to those achieved using different analytical parameters (polyphenolic content, organic acids and volatile compounds). SLDA and PLS-DA results show the ability of mid-FT-IR spectra to discriminate among vinegars from different raw materials and with or without ageing in wood, with correct classification percentages similar to those obtained using different analytical parameters. CONCLUSION: The discriminative ability combined with other advantages (e.g. rapid and non-destructive analysis, low cost) makes this new FT-IR method a promising tool for the classification and/or differentiation of vinegars"
Keywords:		"Acetic Acid/chemistry/*classification Discriminant Analysis Food Analysis/*methods Least-Squares Analysis Multivariate Analysis Spectroscopy, Fourier Transform Infrared/*methods *Statistics as Topic Wood;"
Notes:		"MedlineGuerrero, Enrique Duran Mejias, Remedios Castro Marin, Ramon Natera Lovillo, Miguel Palma Barroso, Carmelo Garcia eng Research Support, Non-U.S. Gov't Validation Study England 2010/04/01 J Sci Food Agric. 2010 Mar 15; 90(4):712-8. doi: 10.1002/jsfa.3873"