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- W2000901610 abstract "Abstract Principal component analysis and hierarchical clustering methods were used to differentiate coffees from 8 different origins produced by the same manufacturer. The analysis was applied to 23 peaks of the aroma fraction. The peaks were tentatively identified by GC–MS. The aroma fraction can successfully be employed to characterise roasted coffees of different origins. The effect of roasting is emphasised when the same method is applied to green coffees of the same origins and the same manufacturer. This paper reports the possibility of characterising roasted coffee by PCA of some of the aroma compounds through the use of a purge and trap sampling device and GC–FID analysis. The aroma fraction was obtained after milling the beans over controlled conditions and using the purge and trap sampling technique as sample introducing system for GC analysis. Thermal desorption took place during 5 min and the vapours were cryofocused at the head of the capillary column for 5 min." @default.
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- W2000901610 date "1999-10-01" @default.
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- W2000901610 title "Coffee geographic origin — an aid to coffee differentiation" @default.
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- W2000901610 doi "https://doi.org/10.1016/s0963-9969(99)00132-5" @default.
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