In order to guarantee a representative sample, thin liquid products must be homogenized by shaking, while viscous products must be stirred (refer to R-320.00.000 - Sample Preparation of Hop Extract).
Isomerized hop extract intended for use in beer brewing or elsewhere in the food industry
A representative sample of homogenized material is necessary for the analysis. For this reason, if at all possible, samples of the hops or hop products should be taken from their original packaging for analysis.