The objective of this study was to analyze the volatile profiles of both green and roasted coffee beans, for
assessment of roasting degrees under two different processing temperatures. Volatiles extraction and
concentration were performed by solid phase micro-extraction (SPME) of the ground coffee headspace
and analysis of the volatiles profile was performed by GC–MS. Four SPME fibers were evaluated, with
the one that extracted the highest amount of substances (DVB/CAR/PDMS) being selected. Statistical
analysis of the data by principal components (PCA/clusters) showed that the volatile components profile
provided separation of green and roasted coffees and also separation according to roasting degree and
roasting temperature. Results also indicate that color and weight loss measurements alone are not reliable
for roasting degree assessment.