ABSTRACT
Coffee plays an important economic and social role, worldwide. The global acceptance of coffee as a drink and commodity can be demonstrated not only in the number of consumers but even in water quality studies, where caffeine has been considered an anthropogenic chemical marker and its concentration has been associated with population density (Buerge et al., 2003). Moreover, nowadays coffee is no longer seen just as a stimulant, due to the caffeine content, but is also considered as a beverage with important antioxidant properties due the bioactive compounds it contains (Liu and Kitts, 2011).
