SENSORY PROFILE OF PEACH NECTARS - EVALUA TION OF ASSESSORS AND ATTRIBUTES BY GENERALIZED PROCRUSTES ANALYSIS

A trained panel evaluated eight peach nectars by conventional descript ive profile analysis. Two-way analysis of variance showed significant (alpha less than or equal to 0.05) differences between samples for the 13 attributes evaluated. For nine of them, interaction between sample s and assessors was also significant. The internal structure of the da ta was analysed by generalized Procrustes analysis. It was found that two attributes (granularity and aftertaste) were not good discriminato rs between samples and that two assessors (1 and 2) differed considera bly from the average response. Principal component analysis was applie d to the mean scores of samples, considering all attributes and comput ing means for all assessors and after removing the data for two attrib utes and two assessors. Similar sample configurations were obtained in both cases. The two first axes explained more of the total variabilit y in the second case (78.8% vs 69.6%).