Extraction was performed on a modified commercial coffee machine
, from which the pump was replaced with a pressure-programmable one, enabling an extraction
of the capsule at a constant pressure of 20 bars.
Acqua Panna water was used and coffees with final volumes of approximately 10-, 20-, 40-, 80-, 110 and 150 mL
were prepared.
For each volume, an average of 3 extractions having similar extraction times and volumes was performed.
The 3 extracts were pooled prior coffee odorant analysis.