beer uno kit
Sensory training kit used to train professional beer tasters to recognize and scale the intensity of ten different beer flavour notes.
Use this set of certified beer flavour standards to deliver up to two hours of taster training for ten people, or as a personal flavour training kit, allowing you to train yourself to recognize each of the ten flavour notes over a longer period of time. The kit includes four positive beer flavours, four off-flavours and two taints. The AROXA™ Uno Beer Flavour Standards kit comes complete with a presentation box and informative flavour cards for each standard. AROXA™ certified beer flavour standards are: food grade | free from sensory impurities | extensively tested | safe to smell and taste. Unsure whether this kit is right for you? Don't forget about our 100% satisfaction guarantee.
Technical specification
Assessment
The best way to detect diacetyl flavour is to swirl the beer, without covering the glass, to release the aroma then take a single short sniff. Some people have difficulty detecting this compound on aroma and can best pick it up by a 'slickness' in the mouth.
Amount of flavour per capsule
130 µg per capsule
Threshold
The flavour threshold of 2,3-butanedione in beer is 10 – 40 µg / l. The precise concentration varies with beer type.
Origins
Diacetyl is produced in beer from a precursor (alpha-acetolactate) formed by brewer's yeast during fermentation. It can also be formed by contaminant lactic acid bacteria such as Lactobacillus and Pediococcus spp.
Confusions
Diacetyl is sometimes confused with the following flavours in beer:
Butyric acid
Vanillin
Isobutyraldehyde
Importance
Diacetyl is a desirable flavour in some ales, stouts and lagers, eg Pilsner. It is considered an off-flavour in other lager beers. Considerable efforts are made by breweries to tightly control the concentration of 2,3-butanedione in beer.
CAS registry number
The CAS registry number for 2,3-butanedione is 431-03-8
Other names
Alternative names for 2,3-butanedione include:
diacetyl
biacetyl
2,3-butane dione
butane-2,3-dione
2,3-diketobutane
dimethyl diketone
dimethyl glyoxal
2,3-dioxobutane
Remarks
2,3-Butanedione is one of two vicinal diketones found in beer. The ratio of diacetyl to pentanedione concentrations can be used as an indicator of bacterial contamination in beer. Information on this page has been compiled by Bill Simpson.
Threshold distribution
Capsules per pot
10
Legal notices
This product is protected by the following trade marks and patents:
US Patent no. D679900
European Community Trade Mark
Registration no. 009937574
European Community Trade Mark
Registration no. 009856527
US Trade Mark Registration no. 4345057
US Trade Mark Registration no. 4345056
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