New International Calibration Standard (ICE-3) for HPLC Analysis of a- and P-acids

摘要

In 1996 the EBC and the ASBC released the first "International Calibration Extract" (ICE-1) for HPLC analysis of a- and P-acids in hops and hop products. A joint EBC/ASBC Hop Standard Sub-Committee was established to monitor the stability of ICE-1. The results of a check carried out in spring 1997 convinced the Sub-Committee to plan the release of a new hop standard. To guarantee the best possible stability of the successor the Working Group of Hop Analysis (AHA) tested in extensive storage trials at -20℃ and +40℃ several extracts of varying composition each one filled in aluminum, tin, plastic or glass vials.