Author Topic: When to measure mash pH...  (Read 3180 times)

Offline Phil_M

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When to measure mash pH...
« on: February 21, 2015, 12:08:22 AM »
So, as I understand it, mash pH varies with time. When is the best time to get a "general" reading?
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Offline quattlebaum

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Re: When to measure mash pH...
« Reply #1 on: February 21, 2015, 01:45:47 AM »
I take mine at 10 to 15 min

Offline Phil_M

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Re: When to measure mash pH...
« Reply #2 on: February 21, 2015, 02:38:27 AM »
That's when I measured pH in my last batch. I'm just curious about at what time other brewers aim to hit their target pH.
Corn is a fine adjunct in beer.

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Offline mainebrewer

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Re: When to measure mash pH...
« Reply #3 on: February 21, 2015, 11:37:17 AM »
I also check the pH 10-15 min after beginning the mash.
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Offline majorvices

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Re: When to measure mash pH...
« Reply #4 on: February 21, 2015, 11:50:37 AM »
10-15 for me, too.

Offline hopfenundmalz

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Re: When to measure mash pH...
« Reply #5 on: February 21, 2015, 12:33:23 PM »
Mash in, stir, check/adjust temp, stir some more. Gee, it is 10-15 minutes in, time to check the pH.

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Offline Wort-H.O.G.

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Re: When to measure mash pH...
« Reply #6 on: February 21, 2015, 12:42:50 PM »
take it at around 5 minutes.....then again around 10-15 and tell me the variance.

EDIT:  reason i asked is because done this many times making sure about my PH. just this morning, I took my mash in PH at around 5 minutes as usual. it was 5.35.  just collected the wort and read PH....5.36. (that's before any sparge water)

for me, i just like to get everything mixed well and that takes about 5 minutes. I immediately take my sample for PH, and then make any needed adjustments, and keep stirring until i get to desired mash temp...all within 10  minutes of time.
« Last Edit: February 21, 2015, 01:30:44 PM by Wort-H.O.G. »
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Offline wyobrew

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Re: When to measure mash pH...
« Reply #7 on: February 21, 2015, 03:19:29 PM »
What if it needs adjusted? Hasn't a lot of the conversion taken place by 15 min? I recently started checking mine at 10-15 like you all say and it has been OK. I just wonder what to do if it's not. I'm usually about 30 in by the time it's cool and checked so I figured it's too late to do anything other than take a note for next time.

Offline Wort-H.O.G.

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Re: When to measure mash pH...
« Reply #8 on: February 21, 2015, 03:34:31 PM »

What if it needs adjusted? Hasn't a lot of the conversion taken place by 15 min? I recently started checking mine at 10-15 like you all say and it has been OK. I just wonder what to do if it's not. I'm usually about 30 in by the time it's cool and checked so I figured it's too late to do anything other than take a note for next time.
That's why at 5 minutes is my method.


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Ken- Chagrin Falls, OH
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Offline Phil_M

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Re: When to measure mash pH...
« Reply #9 on: February 21, 2015, 05:25:58 PM »
Didn't see the responses in time to take two sample, instead just took one sample at 10 minutes.

Mash had a pH of 6.01.  >:( I'm brewing an Irish stout, FYI.

I have really alkaline water, pH of 8.0, 155 ppm HC03. Getting my pH right in a full-volume mash BIAB has been a pain…
Corn is a fine adjunct in beer.

And don't buy stale beer.

Offline Wort-H.O.G.

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Re: When to measure mash pH...
« Reply #10 on: February 21, 2015, 05:30:40 PM »
Didn't see the responses in time to take two sample, instead just took one sample at 10 minutes.

Mash had a pH of 6.01.  >:( I'm brewing an Irish stout, FYI.

I have really alkaline water, pH of 8.0, 155 ppm HC03. Getting my pH right in a full-volume mash BIAB has been a pain…

are you using water software for brewing profile..like bru'nwater for example? 
Ken- Chagrin Falls, OH
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Offline Phil_M

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Re: When to measure mash pH...
« Reply #11 on: February 21, 2015, 05:39:48 PM »
This was part of an experiment on how well Beersmith works for that...either it doesn't, or I'm not using it correctly.
Corn is a fine adjunct in beer.

And don't buy stale beer.

Offline HoosierBrew

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Re: When to measure mash pH...
« Reply #12 on: February 21, 2015, 05:41:55 PM »
+1 to Bru'nwater.  Makes all the difference.
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Offline macbrews

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Re: When to measure mash pH...
« Reply #13 on: February 21, 2015, 06:08:58 PM »
What if it needs adjusted? Hasn't a lot of the conversion taken place by 15 min? I recently started checking mine at 10-15 like you all say and it has been OK. I just wonder what to do if it's not. I'm usually about 30 in by the time it's cool and checked so I figured it's too late to do anything other than take a note for next time.

Get a test tube, fill it with the wort and put it in a glass of ice water.  It is ready to check the pH in about 1 minute.  Works great.

Mac

Offline Wort-H.O.G.

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Re: When to measure mash pH...
« Reply #14 on: February 21, 2015, 06:20:32 PM »
here is Kai's advice on mash PH, and I have been very happy with results :
http://braukaiser.com/blog/blog/2011/03/02/about-ph-targets-and-temperature/
"And to answer the question that is most interesting to brewers, I believe that the optimal mash pH range is 5.3-5.5 for light beers and 5.4-5.6 for darker beers when testing a room temperature sample of the mash. This pH range is a good compromise between optimal enzyme activity, good boil pH and good cast-out wort pH."

When I want a little bump either direction, I will do that in the kettle. If i get my mash to fall in his guidelines above for lighter and darker beers, I generally leave PH alone in the mash.
« Last Edit: February 21, 2015, 06:22:31 PM by Wort-H.O.G. »
Ken- Chagrin Falls, OH
CPT, U.S.Army
https://www.facebook.com/pages/Harveys-Brewhaus/405092862905115

http://braukaiser.com/wiki/index.php?title=The_Science_of_Mashing

Serving:        In Process:
Vienna IPA          O'Fest
Dort
Mead                 
Cider                         
Ger'merican Blonde
Amber Ale
Next:
Ger Pils
O'Fest