Monitoring the colour and bitterness of beer

Details Monitoring the colour and bitterness of beer Monitoring the colour and bitterness of beer

G - Physics

01

N

G01N 33/14 (2006.01) C12M 1/34 (2006.01) G01N 21/25 (2006.01) G01N 21/64 (2006.01)

Patent

CA 2182402

A method of determining one or both of the colour and bitterness of beer by illuminating the beer with light of a pre-determined wavelength, typically 400 30 nm, to cause iso-.alpha.-acids in the beer to fluoresce. The fluorescence is detected over a range of wavelengths, typically 420 to 673 nm, using a fluorescence spectrophotometer. One or both of the colour and bitterness of the beer is determined by comparing an output signal from the fluorescence spectrophotometer to output signals stored for beers of known colour and bitterness.

Procédé permettant de déterminer la couleur et/ou l'amertume d'une bière en l'éclairant à l'aide d'une lumière d'une longueur d'onde prédéterminée, par exemple de 400 ~ 30 nm, pour rendre fluorescents les acides iso-.alpha. se trouvant dans la bière. La fluorescence est détectable pour une plage de longueurs d'ondes par exemple de 420 à 673 nm, à l'aide d'un spectrophotomètre à fluorescence. La couleur et/ou l'amertume de la bière se détermine en comparant le signal de sortie du spectromètre à fluorescence, aux signaux de sortie enregistrés correspondant à des bières de couleur et amertume connus.

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