Sao Paulo State Univ UNESP, Fac Agr Sci, Botucatu, SP - Brazil
 Fed Univ Sao Carlos UFSCar, Dept Chem, Sao Carlos, SP - Brazil
Total Affiliations: 2
MAR 30 2022.
Web of Science Citations:
The main precursors of bitter principles of beer are alpha-acids, followed by beta-acids. Determination of their content in hop cones and their derivatives is an essential part of brewing. HPLC-UV is the preferred technique when a more precise quantification of some specific bitter acids are required. However, current methods do not allow the proper quantification of all the six major alpha- and beta-acids; furthermore, these multi-step methods generate considerable volumes of chemical waste. In this work, a new UHPLC-UV protocol was developed and compared side-by-side with reference, considering traditional and sustainability parameters. Baseline separations were achieved for the six major bitter acids and xanthohumol, while a greener and faster sample preparation procedure was developed. The new validated procedure could be adopted for quality control of hops and their derivative products with enhanced sample throughput and with a potential gain in the safety of the analyst. (AU)