Determination of xanthohumol and isoxanthohumol
All beers, beer-based beverages, wort, ethanol extracts, CO2 spent hops and xanthohumol products
Xanthohumol and isoxanthohumol are dissolved with acetonitrile from the sample and following separation, are determined using a Nucleodur C18 column and UV detection.
This method describes how to determine whether there are pre-germinated kernels in a lot of barley as part of visual and manual inspection processes.
Barley intended for the production of malt; therefore, the kernels are to be evaluated on the basis of the characteristics described below.
Barley is visually inspected for the presence of “open” pre-germination which may be evidence of the presence of “hidden” pre-germination.