John Paul Maye, Robert Smith, and Jeremy Leker. S.S.
Steiner, Inc., New York, NY, U.S.A.
Humulinones are a natural hop bitter acid that can be found in leaf
hops, and their concentration can increase over several days following
hop pelleting. Hops and hop pellets with a high hop storage index (HSI)
have higher concentrations of humulinones than hops and hop pellets with
a lower HSI. High concentrations of humulinones have recently been found
in beers that have been dry hopped, in some cases as high as 24 ppm. Dry
hopping experiments show humulinones readily dissolve in beer and can
impact the bitterness profile of dry hopped beers. Additionally, dry
hopping can cause a significant loss in iso-α-acid
concentration, especially in beers containing high concentrations of
Keywords: Humulinone, Dry hopping