Coffee beans from different regions and of different species have different commercial values. A recent paper (here – open access) reported a method to differentiate green beans from different species (Arabica vs Rustica) and harvested from different regions of Vietnam. The test technique was ultraviolet–visible (UV–VIS) spectroscopy combined with the Partial Least Squares with Discriminant Analysis (PLS–DA) model. Spectra of 147 authenticated samples were used to build prediction models. The authors reported that accuracy of species differentiation was 100%. Accuracy of regional differentiation varied from 88% to 96%. They concluded that the results show the potential of UV–VIS spectroscopy databases to verify the authenticity of green coffee beans.
Photo by Gerson Cifuentes on Unsplash
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