Objective Evaluation of Various Trade Varieties of Coffee by Coupling of Analytical Data and Multivariate Analyses

Kouji Wada, Hitoshi Sasaki, Mitsuya Shimoda, Yutaka Osajima

研究成果: Contribution to journalArticle査読

抄録

The aroma profiles of 39 coffee samples (32 arabica and 7 robusta coffees) were evaluated objectively by the coupling of gas chromatographic analysis and two kinds of multivariate analysis (principal component analysis and cluster analysis) and compared with the classification on the basis of a cup test of brewed coffee by cup testers. Robusta coffees were separated from arabica coffees by principal component analysis (PCA) and cluster analysis. Using PCA of only 32 arabica coffee samples, their aroma profiles could be characterized on the first and second principal components. The components responsible for grassy aroma and earthy odor, respectively, were clarified from the factor loadings obtained by PCA. Furthermore, 32 arabica coffees were divided into seven clusters by cluster analysis of the first and second principal components obtained by PCA. Consequently, 39 coffee samples were classified into eight groups and the result was consistent with the classification on the basis of sensory evaluation except for two samples.

本文言語英語
ページ(範囲)1753-1760
ページ数8
ジャーナルAgricultural and Biological Chemistry
51
7
DOI
出版ステータス出版済み - 1987

All Science Journal Classification (ASJC) codes

  • 生化学、遺伝学、分子生物学(全般)
  • 農業および生物科学(全般)

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