Pardon my crappy scanner, but this is what I'm seeing.
Chromatogram from Shimadzu SPD-10A uv/vis detector at 314 nm.
Chromatogram from an ESA Coulochem III electrochemical detector.
Xan = xanthohumol
CoH = cohumulone
H = ad- and n-humulone
CoL = colupulone
L = lupulone
? = unknown
Notice the unknown compounds in the ECD trace.
The following two papers are said to report information on phenolic compounds, flavones and glycosides in beer. If you have access to them I would very much like for you to send me a copy.
Floridi S. et al. J. Agric. Food Chem. Vol 51, p1548 - (2003)
Rehova, L. et al. J. Sep. Sci. Vol 27, p 1345 - (2004)
Charlie
"Yes officer, I know that I smell like beer. I'm not drinking it, I'm wearing it!"