Analysis of sensory data of Aceto Balsamico Tradizionale di Modena (ABTM) of different ageing by application of PARAFAC models

Aceto Balsamico Tradizionale di Modena is a typical Italian food product of protected denomination of origin. obtained by alcoholic fermentation and acetic bio-oxidation of cooked musts. and it is aged for at least 12 years in series of wooden casks. The product suitable for marketing is qualified by sensory examination on the whole of 13 sensory parameters. In this study, a series of six casks for each of seven different producers have been investigated by an expert Panel of eight judges. aiming at (i) assessing the degree of variability of the different sensorial attributes with samples ageing, and (ii) evaluating the similarity/dissimilarity among the various parameters together with the degree of agreement of the panellists. Given the three-way nature of the data (samples x panellists x sensory attributes) the PARAFAC method has been used, and a satisfactory model was obtained, highlighting the efficacy of three-way analysis in dealing with the different sources of data variability, extracting the relevant information and displaying it in a simple and interpretable manner. (C) 2005 Elsevier Ltd. All rights reserved.