[Brygforum] Iced øl - beregning af alkohol

Heikki Levanto heikki at lsd.dk
Fri Jun 12 14:22:07 CEST 2009


On Fri, Jun 12, 2009 at 10:37:06AM +0000, Kristian Uhre wrote:
> 
> Nu har jeg søgt lidt på nettet, men synes ikke rigtigt jeg har kunne finde
> noget omkring iced øl som eksempelvis Eisbock. Jeg står nemlig og overvejer
> at lave en iced barley wine eller iced imperial stout.  
> ...
> Men mit egentlige spørgsmål er hvordan man beregner alkoholstyrken?
> Jeg tvivler stærkt på at FG/OG målingerne kan bruges her, kan man evt. få
> verificeret styrken på et laboratorie?  
>

I'm sure some labs can do it - at a cost. Perhaps for a few bottles of beer,
if you know the right person...

I haven't done the math myself, but I think a gravity reading before and
after the freezing operation should tell you something about the alcohol.
After all, alcohol is lighter than water, so the gravity ought to get less.

Maybe you can experiment your way to it. For example, take some of the
(unfrozen) beer, and add pure alcohol until you get the same gravity as your
frozen beer. See how much you added, and calculate from that. I bet you can
use 40% whisky as well, if you remember that in your calculations. Or
denatured (cooking) spirit. But don't drink the stuff!

> Er der nogen der har erfaringer for at fryse øl?

Not me (yet?)


Good luck with the project. Remember to report if you have some results, even
if they aren't that positive!

Hmm, for the sake of an experiment, one could freeze some beer that has gone
bad, and see how it affects things. No need to risk good beer for the
experiment, before knowing how well it goes...

  -H

-- 
Heikki Levanto   "In Murphy We Turst"     heikki (at) lsd (dot) dk




More information about the Brygforum mailing list