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Food Science and Technology International
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Perfil descriptivo de néctares de melocotón. Evaluación de jueces y de atributos con el análisis de Procrustes generalizado/Sensory profile of peach nectars. Evaluation of assessors and attributes by generalized Procrustes analysis

M.V. Pastor

Instituto de Agroquímica y Tecnología de Alimentos, CSIC, PO Box 73, 46100 Burjassot, Valencia, Spain

E. Costell

Instituto de Agroquímica y Tecnología de Alimentos, CSIC, PO Box 73, 46100 Burjassot, Valencia, Spain

L. Izquierdo

Instituto de Agroquímica y Tecnología de Alimentos, CSIC, PO Box 73, 46100 Burjassot, Valencia, Spain

L. Durán

Instituto de Agroquímica y Tecnología de Alimentos, CSIC, PO Box 73, 46100 Burjassot, Valencia, Spain

A trained panel evaluated eight peach nectars by conventional descriptive profile analysis. Two- way analysis of variance showed significant ({alpha} ≤ 0.05) differences between samples for the 13 attributes evaluated. For nine of them, interaction between samples and assessors was also signif icant. The internal structure of the data was analysed by generalized Procrustes analysis. It was found that two attributes (granularity and aftertaste) were not good discriminators between samples and that two assessors (1 and 2) differed considerably from the average response. Principal component analysis was applied to the mean scores of samples, considering all attributes and computing means for all assessors and after removing the data for two attributes and two asses sors. Similar sample configurations were obtained in both cases. The two first axes explained more of the total variability in the second case (78.8% vs 69.6%).

Key Words: sensory profile • assessors • attributes • generalized Procrustes analysis

Food Science and Technology International, Vol. 2, No. 4, 219-230 (1996)
DOI: 10.1177/108201329600200404
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[Abstract] [PDF]