Coffee's country of origin determined by NMR: The Colombian case. (15th May 2015)

• Record Type: Journal Article
• Authors: Arana, V.A.; Medina, J.; Alarcon, R.; Moreno, E.; Heintz, L.; Schäfer, H.; Wist, J.
• Is Part Of: Food chemistry. Volume 175(2015)
• Page Start: 500
• Page End: 506
• Publication Date: 2015-05-15
• Subjects: 1H NMR fingerprinting -- Geographical origin -- Fraud detection -- Roasted coffee -- PLS-DA; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2014.11.160
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: 1 H NMR fingerprinting allows to discriminate Colombian from all other coffees. Samples are prepared in non-deuterated methanol. Spectra are acquired using automatic suppression of solvent peaks. Abstract: The determination of the origin of coffee beans by NMR fingerprinting has been shown promising and classification has been reported for samples of different countries and continents. Here we show that this technique can be extended and applied to discriminate coffee samples from one country against all others, including its closest neighbors. Very high classification rates are reported using a large number of spectra (>300) acquired over a two-year period. As original aspects it can be highlighted that this study was performed in fully automatic mode and with non-deuterated coffee extracts. This is achieved using a series of experiments to procure a robust suppression of the solvent peaks. As is, the method represents a cost effective opportunity for countries to protect their national productions.