Glass capillary gas chromatography of hop bitter acids. II. Desoxy-α-acids in hop extracts

Summary The presence of about 0.5 to 1% desoxy--acids in hops and hop extracts is confirmed. Desoxy--acids are supposed to be biogenetic precursors and these compounds could be present in the hops as a surplus to this activity, but it is more likely that they have been formed from -and -acids. A gas chromatographic method for analysing the desoxy--acids amount in hops and in hop extracts is described.