期刊
FOOD CHEMISTRY
卷 229, 期 -, 页码 743-751出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2017.02.149
关键词
Coffee; Electronic nose; Electronic tongue; Data fusion; Chemometrics; Classification
资金
- Chinese National Natural Science Foundation [31501404]
- China Central Public-Interest Scientific Institution Basal Research Fund [1630142016012]
Electronic nose and tongue sensors and chemometric multivariate analysis were applied to characterize and classify 7 Chinese robusta coffee cultivars with different roasting degrees. Analytical data were obtained from 126 samples of roasted coffee beans distributed in the Hainan Province of China. Physicochemical qualities, such as the pH, titratable acidity (TA), total soluble solids (TSS), total solids (TS), and TSS/TA ratio, were determined by wet chemistry methods. Data fusion strategies were investigated to improve the performance of models relative to the performance of a single technique. Clear classification of all the studied coffee samples was achieved by principal component analysis, K-nearest neighbour analysis, partial least squares discriminant analysis, and a back-propagation artificial neural network. Quantitative models were established between the sensor responses and the reference physicochemical qualities, using partial least squares regression (PLSR). The PLSR model with a fusion data set was considered the best model for determining the quality parameters. (C) 2017 Elsevier Ltd. All rights reserved.
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