A predictive method for the determination of the roasted coffee blend composition (Arabica/Robusta) based on the ratio between the absolute GC-FID peak area of kahweol (K) and the sum of K and 16-O-methylcafestol (16MCF) is presented. The percentage of Robusta in 82 commercial samples of blends and pure varieties with known composition was used to build a cubic polynomial function with R2=0.998. Considering eight commercial blends (ranging 0-90% Robusta), no significant difference (two-tailed P=0.817) was registered between the claimed and the predicted composition.

Authentication of Italian Espresso coffee blends through the GC peak ratio between 4 kahweol and 16-O-methylcafestol.

PACETTI, Deborah;BOSELLI, EMANUELE;BALZANO, MICHELE;FREGA, Natale Giuseppe
2012-01-01

Abstract

A predictive method for the determination of the roasted coffee blend composition (Arabica/Robusta) based on the ratio between the absolute GC-FID peak area of kahweol (K) and the sum of K and 16-O-methylcafestol (16MCF) is presented. The percentage of Robusta in 82 commercial samples of blends and pure varieties with known composition was used to build a cubic polynomial function with R2=0.998. Considering eight commercial blends (ranging 0-90% Robusta), no significant difference (two-tailed P=0.817) was registered between the claimed and the predicted composition.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11566/74523
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