I just attended “Humulus U.”, BSG’s hop school. It was very informative and surprisingly different than the Haas hop school, the only other one I have attended.
One of the most interesting points to me was in a talk about the use of a gas chromatograph to measure the effects of things like harvest timing and kilning, etcetera. I have always assumed that kilning removed some of the more volatile oils in the hop. Not so! The GC graph pre & post kilning were the same.
Now I know.