PC2 (19.2% of the total variance) was mainly and positively characterized by the
Absorbance at 420 nm. So that, those coffees roasted with sugar
addition (torrefacto)weremapped in the top half-part of the graphic.
Roasting degree also exerts influence on brown compounds formation
because dark roasted coffees showed significantly (p < 0.05)
higher Absorbances at 420 nm than medium and light conventional
coffees (Table 1). However, this influence was much lower than that
induced by torrefacto roast because (1) there were no significant
differences between medium and light conventional coffees in
agreement with other authors