Abstract
Principal components analysis (PCA) followed by linear discriminant analysis (LDA) of the nuclear magnetic resonance (NMR) spectra from 98 instant spray-dried coffees, obtained from 3 different producers, correctly attributed 99% of the samples to their manufacturer. Blind testing of the PCA model with a further 36 samples of instant coffee resulted in a 100% success rate in identifying the samples from the 3 manufacturers. Coffees from one manufacturer were also assigned into 2 groups using these techniques, and the compound 5-(hydroxymethyl)-2-furaldehyde was identified as the primary marker of differentiation.
Original language | English |
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Pages (from-to) | 3098-3103 |
Number of pages | 6 |
Journal | Journal of Agricultural and Food Chemistry |
Volume | 50 |
Issue number | 11 |
DOIs | |
Publication status | Published - 22 May 2002 |
Externally published | Yes |
Keywords
- Authenticity
- Chemometrics
- Coffee
- LDA
- NMR
- PCA
- Quality assurance
ASJC Scopus subject areas
- Chemistry(all)
- Agricultural and Biological Sciences(all)