final brew preparation, in order to achieve the optimal result in-cup. In this study, the role of the physicochemical
properties (volatility and polarity) of coffee odorants during extractionwas investigated. The extraction
kinetics of 20 key coffee odorants froma coffee bedwere measured using quantitative in-cup aromaanalysis. The
kinetics differed depending on the coffee odorants' properties. The extraction speed could be correlatedwith the
odorants' polarity. Higher polar components, such as 2,3-butanedione,were released much faster fromthe coffee
bed as compared to lower polar ones such as β-damascenone. In contrast, the odorants' volatility did not seem to
play a major role. Due to the different kinetics of extraction of the coffee odorants, the in-cup aroma balance
changed continuously as more water passed through the coffee bed