Sweet stout water- building from scratch - Page 3 - Home Brew Forums

Register Now!
Home Brew Forums > Home Brewing Beer > Brew Science > Sweet stout water- building from scratch

Reply
 
Thread Tools
Old 10-10-2012, 03:55 PM   #21
cooper
Recipes 
 
Dec 2009
OFallon, IL
Posts: 467
Liked 28 Times on 25 Posts


Maybe we should start waving dead chickens at it?

 
Reply With Quote
Old 10-11-2012, 03:33 AM   #22
ajdelange
HBT_LIFETIMESUPPORTER.png
Recipes 
 
Aug 2010
McLean/Ogden, Virginia/Quebec
Posts: 9,033
Liked 1402 Times on 1069 Posts


The reactions do take some time to complete so pH usually gradually declines over 20 minutes and even a bit longer but most of the decrease should have taken place after 20 minutes. To decrease 0.4 or more from that point on would be most unusual and suggests that indeed there was something wrong with the 20 minute reading. Certainly some residual phosphoric acid could throw the reading off. Whenever you get a reading that causes you a raised eyebrow you should repeat it and if is still off a cal check on the meter is in order. An important part of using a pH meter is knowing when not to believe it.

I have had pH readings under 5 in mashes that use sauermalz. I theorize that the lactic acid on the surface of the malt is washed off at strike and is responsible for the low reading. Within a few minutes, however, this acid has a chance to react with bases in the othe malts and the pH goes up starting to level off at around 20 minutes.

 
Reply With Quote
Old 10-11-2012, 06:20 AM   #23
diS
 
diS's Avatar
Recipes 
 
Apr 2011
Croatia
Posts: 997
Liked 48 Times on 45 Posts


Quote:
Originally Posted by ajdelange View Post
An important part of using a pH meter is knowing when not to believe it.
Good point.
__________________
We are only 10,000 years into beer... there are thousands of years left to go!
Things are bound to change!!

Brewroom with HERMS build
Fermentation chamber and Keezer.. a.k.a. FermKeezer

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Building Pilsner Water michaeltrego Brew Science 11 05-11-2011 05:58 PM
Building Water for American Stout VikeMan Brew Science 5 04-18-2011 09:27 PM
Building RO IPA water Dog House Brew Brew Science 1 01-20-2011 06:37 PM
Water building question? bgough Brew Science 0 03-24-2010 03:10 AM
building water JLem Brew Science 0 02-26-2010 06:31 PM


Forum Jump