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General Category => All Grain Brewing => Topic started by: quattlebaum on September 28, 2013, 03:37:52 PM

Title: Conversion at 5.2PH?
Post by: quattlebaum on September 28, 2013, 03:37:52 PM
Does any know if conversion with this grain bill will be affected. For some unknown reason my PH was lower than i expected 5.22PH. Should have been 5.5 per my spreadsheet. My preboil gravity was suppose to be 1.046 but was 1.042 i mashed for 75 min. I normally am within a few points. Anyway, would love some feedback on if this type of grain bill which i believe has a higher percent of low enzymatic malts has difficulty converting because of a lower than optimal mash PH.


74.43 Marris otter
7.88 munich 10L
2.01 chocolate
3.92 victory
3.92 C-120
7.84 C-40

75% brewhouse efficiency 
Title: Re: Conversion at 5.2PH?
Post by: denny on September 28, 2013, 04:05:43 PM
Does any know if conversion with this grain bill will be affected. For some unknown reason my PH was lower than i expected 5.22PH. Should have been 5.5 per my spreadsheet. My preboil gravity was suppose to be 1.046 but was 1.042 i mashed for 75 min. I normally am within a few points. Anyway, would love some feedback on if this type of grain bill which i believe has a higher percent of low enzymatic malts has difficulty converting because of a lower than optimal mash PH.


74.43 Marris otter
7.88 munich 10L
2.01 chocolate
3.92 victory
3.92 C-120
7.84 C-40

75% brewhouse efficiency

I can't imagine why there'd be any problem.
Title: Re: Conversion at 5.2PH?
Post by: HoosierBrew on September 28, 2013, 04:15:58 PM
I made my last Saison at right ~ 5.25 pH, after reading a posting (by Martin I think) that such a pH could actually be beneficial to the style, as it is a beer where a slight tartness can be desireable.  I was within a point of my target gravity, and the beer attenuated all the way down to 1.002. So I think I converted plenty of sugars there.
Title: Re: Conversion at 5.2PH?
Post by: narvin on September 28, 2013, 04:50:03 PM
How did you measure pH, and at what temperature?
Title: Re: Conversion at 5.2PH?
Post by: quattlebaum on September 28, 2013, 04:55:56 PM
Milwaukee 101 PH meter calibrated at 77F. 
Title: Re: Conversion at 5.2PH?
Post by: mabrungard on September 28, 2013, 09:00:17 PM
There should be no problem with conversion. If anything, the low pH may promote excessive conversion and produce a bit thinner beer.  It will still be beer though!