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Lookup NU author(s): Dr James DonarskiORCiD
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Proton nuclear magnetic resonance spectroscopy (1H NMR) and multivariate analysis techniques have been used to classify honey into two groups by geographical origin. Honey from Corsica (Miel de Corse) was used as an example of a protected designation of origin product. Mathematical models were constructed to determine the feasibility of distinguishing between honey from Corsica and that from other geographical locations in Europe, using 1H NMR spectroscopy. Honey from 10 different regions within five countries was analyzed. 1H NMR spectra were used as input variables for projection to latent structures (PLS) followed by linear discriminant analysis (LDA) and genetic programming (GP). Models were generated using three methods, PLS-LDA, two-stage GP, and a combination of PLS and GP (PLS-GP). The PLS-GP model used variables selected by PLS for subsequent GP calculations. All models were generated using Venetian blind cross-validation. Overall classification rates for the discrimination of Corsican and non-Corsican honey of 75.8, 94.5, and 96.2% were determined using PLS-LDA, two-stage GP, and PLS-GP, respectively. The variables utilized by PLS-GP were related to their 1H NMR chemical shifts, and this led to the identification of trigonelline in honey for the first time.
Author(s): Donarski JA, Jones SA, Charlton AJ
Publication type: Article
Publication status: Published
Journal: Journal of Agricultural and Food Chemistry
Year: 2008
Volume: 56
Issue: 14
Pages: 5451-5456
Online publication date: 20/06/2008
ISSN (print): 0021-8561
ISSN (electronic): 1520-5118
Publisher: American Chemical Society
URL: https://doi.org/10.1021/jf072402x
DOI: 10.1021/jf072402x
PubMed id: 18564849
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