Fate of benzo(a)pyrene-C during brew process

Benzo(a)pyrene-¹⁴C (1 ppm) was applied to wort and boiled with hops in a brew process. The wort after filtration was subjected to fermentation. The hops and yeast were found to contain more than 99 % of applied radioactivity and consisted of benzo(a)pyrene. The radioactivity dissolved in beer was less than 1 % and the chemical nature could not be identified.