Beer Sensory

This is a page that describes how to add an off-flavor/off-aroma to a commercial beer.

Oxidation

Open a very cold beer and pour out ~ 20 mL (~ the neck of a std bottle)

Darker beers display a "cardboard" oxidation aroma

Hoppy beers loose the hop aroma

Lightstruck

Lightstruck, or "skunked" or "skunky", beer

Leave a clear bottle of beer in the sunlight or expose to UV light source. Some beers use chemically modified hop extracts to prevent the formation of thi off-aroma.

Any beer with hops can produce a skunky aroma (mercaptan) "3-methylbut-2-ene-1-thiol" (MBT)