Fig. 2: Van Krevelen diagram (H/C vs. O/C) of beer compositions shows their diversity and associated compounds classes.

Annotations, which appear in at least 5% of all beer samples are shown. Areas specific for certain compound classes are marked with dotted lines. Color code: CHNO blue; CHNO orange; CHOS green; CHNOS red; P violet; Cl light violet. The bubble size indicates the mean relative intensities.