I need a sanity check here - Page 2 - Home Brew Forums

Register Now!
Home Brew Forums > Home Brewing Beer > Brew Science > I need a sanity check here

Reply
 
Thread Tools
Old 12-20-2012, 12:58 AM   #11
thaworm69
Recipes 
 
Nov 2012
Merrill, WI
Posts: 337
Liked 52 Times on 34 Posts


Sheesh...if God only knew what you were up to...

 
Reply With Quote
Old 12-20-2012, 05:16 PM   #12
uberg33k
Recipes 
 
Nov 2011
Alpharetta, Georgia
Posts: 360
Liked 25 Times on 22 Posts


Quote:
Originally Posted by WoodlandBrew View Post
Yeah, wow much better. Is that MgCl or MgSO4? In either case I would drop it. The malt will have enough Mg. It's better to under do it than over do it. The calculator spread sheets are a good approximation, but still just an approximation. If you aim short, measure pH and add acid if needed you are probably better off.

Here is some information:
http://woodlandbrew.blogspot.com/2012/10/mash-ph.html
It's probably going to get dropped because I can't find MgCl2 anyway.

Now, this isn't the first time I've seen "the malt will have enough Mg". If that's correct, why isn't that accounted for in any brew water spreadsheet?

Unrelated side note: you should post your blog articles to the homebrew community on G+. Quality content you got there.

 
Reply With Quote
Old 12-20-2012, 06:26 PM   #13
WoodlandBrew
HBT_SUPPORTER.png
 
WoodlandBrew's Avatar
Recipes 
 
Oct 2012
Malden, MA
Posts: 2,191
Liked 244 Times on 199 Posts


Quote:
Originally Posted by uberg33k View Post
Now, this isn't the first time I've seen "the malt will have enough Mg". If that's correct, why isn't that accounted for in any brew water spreadsheet?
Good question. I would like to know the answer to that as well. If I was going to wager a guess I would say that at safe levels it has little impact on acual flavor.
Quote:
Unrelated side note: you should post your blog articles to the homebrew community on G+. Quality content you got there.
Thanks! That's a great idea. I'm more of a face book person, so it will take a little tinkering to figure out.
__________________
The 2nd edition is now available: Brewing Engineering
Woodland Brewing Research Blog Applied Science for Better Beer.

 
Reply With Quote
Old 12-20-2012, 08:47 PM   #14
ajdelange
HBT_LIFETIMESUPPORTER.png
Recipes 
 
Aug 2010
McLean/Ogden, Virginia/Quebec
Posts: 9,146
Liked 1453 Times on 1107 Posts


The idea behind water spreadsheets was to determine how to synthesize water. It is only fairly recently that people started trying to predict mash pH (beyond Kolbach's simple relationship) from water chemistry. Malt contains a fair amount of magnesium some of it bound to the phosphate in phytin. It would be the phytin that would effect the mash pH, not the magnesium, and it is the reaction of phosphate with calcium (and magnesium) that Kolbach's formula tries to WAG. Thus magnesium is, in a certain sense, already accounted for.

It's easy enough to make small quantities of magnesium chloride from epsom salts and lime if one has access to food grade hydrochloric acid. But I don't see it doing much for one's beer. Magnesium is not generally regarded as flavor positive.

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Sanity Check Please... dprbrts42 Beginners Beer Brewing Forum 13 09-28-2011 01:57 PM
Sanity check trigger Electric Brewing 46 12-18-2010 12:41 AM
Greetings. First PM sanity check? jayL All Grain & Partial Mash Brewing 1 09-19-2010 01:57 AM
Sanity Check Beer_Maker Brew Stands 5 03-14-2010 12:28 PM
Sanity Check on my IPA Benjibbad All Grain & Partial Mash Brewing 9 07-21-2009 07:07 PM


Forum Jump