This method describes how to conduct a simple descriptive test.
beer, beer-based beverages, non-alcoholic beverages, mineral water
This simple descriptive analysis provides a method for articulately communicating sensory attributes. The method can be utilized to formulate a list of attributes for the profile test. The list of attributes must then be statistically corroborated and reference samples employed to ensure that all of the testers identify the same reference substance for each of the given attributes (e.g., rancid butter, sweaty = reference substance butyric acid).
This method describes how to determine the capacity for water imbibition (moisture uptake) in barley.
Barley intended for the production of malt is evaluated on the basis of its capacity for water imbibition.
Barley is steeped according to a defined scheme, and the absorption of the steeping liquor by the kernels at defined times is determined by calculating the moisture content. The moisture content after 72 h steeping time is used to assess the absorption of steeping liquor or the capacity for water imbibition in barley.
This method described how to perform sensory analysis of hop-aromatic beers.
beer
A joint project in 2005 was organized by industry partners Hopsteiner, HVG and Johann Barth & Sohn along with the Central Marketing Organization of the German Agricultural Industries (CMA) and became known as the CMA scheme. This objective of this tasting scheme is to determine hop-related factors influencing the sensory analysis of beer.
First of all, the intensity and quality of the hop aroma and flavor are evaluated in their entirety according to a ten-point scale with 0 as unpleasant and 10 as very good/very pleasant. Then, the intensities of individual characteristics are also ranked on a ten-point scale, with 0 as imperceptible and 10 as very intense. For beer with a pronounced hop aroma, the following descriptors have become established in recent decades: fruity, floral, citrus, green-grassy and hop-spicy. These are available for specific training in the evaluation of hop oil fractions. Distinctive aromas detected by tasters can be described in the space provided. In order to characterize the overall impact of the hops, the bitterness is also evaluated sensorially. Both the intensity and the quality/harmony are evaluated on a ten-point scale, with 0 rated as completely lacking balance and 10 as very harmonious.
The mean values of the intensity of the hop aroma and flavor as well as the intensity of the bitterness are given on the score sheet (i.e., the sum of the scores divided by the number of tasters). The mean value of each aroma characteristic is reproduced as a spider diagram. The individual values should be checked for outliers prior to the calculating the mean. Since quality assessments are subjective by nature, the mean values can only be of limited value. However, they can be beneficial in determining whether any distinctive aroma or flavor characteristics were judged by the majority to be pleasant or unpleasant. The same applies to assessing the quality of the bitterness.
The PAH compounds are concentrated through extraction with cyclohexane and evaporation. The separation is carried out by means of high-performance thin-layer chromatography. The results are evaluated through examination under UV light, followed by comparison of the Rf values with the reference substances.
During sensory evaluation, the cones are rubbed between the hands and the quality of the aroma is distinguished in terms of purity, fineness and intensity.
Whole hops intended for use in beer brewing or elsewhere in the food industry
Evaluation of the aroma of hop cones is performed through visual and manual inspection.
Points to be awarded: 1−30
Whole hops intended for use in beer brewing or elsewhere in the food industry
Evaluation of the appearance of hop cones is performed through visual inspection and sensory assessment.