HVG Germany: Hopfen

 

Which analysis methods are available for hops and/or chemically not modified hop products?


The Analytica-EBC (2005) describes the following methods in Section 7 Hops: 

To take samples and determine the moisture content :
EBC 7.1 Sampling of Hops and Hop Products
EBC 7.2 Moisture Content of Hops and Hop Products


For the analysis of bitter substances the EBC contains: 3 conductometric methods and 2 HPLC methods:

a) For cone hops and hop pellets the following are applied by conductometry:
EBC 7.4 Lead Conductance Value of Hops, Powders and Pellets
EBC 7.5 Bitter Substances in Hops and Hop Products: Ganzlin Modification of the Wöllmer Method

b) For hop extracts the following are applied by conductometry::
EBC 7.6 Bitter Substances in Hop Extracts: Ganzlin Modification of the Wöllmer Method

c) For all products but primarily for extracts using HPLC (High Performance Liquid Chromatography):
EBC 7.7 alpha and beta acids in Hops and Hop Products by
HPLC EBC 7.8 iso-alpha, alpha and beta acids in Hops and Hop Products by HPLC

Methods of Analysis

ASBC Methods of Analysis (1992) describes the following methods:

To determine the bitter content by means of spectral photometry

ASBC Hops-6: Alpha- and beta-acids in Hops and Hop Pellets by spectrophotometry and by conductometric titration