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Old 05-01-2013, 12:34 PM   #1
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Default Lactic acid measuring and amount

Hello everyone,
I've been brewing for awhile now using Bru'n Water, RO water and brewing salts to get the right PH. I've been thinminv about using some lactic acid to adjust the mash PH if the predicted PH is off. How do you go about measuring it out? And how do you know how much to add when the mash is under way....example..predicted PH=5.4, Actual PH=5.5. How do you know how much to add? Also at what level are you going to start tasting the lactic?

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Old 05-01-2013, 12:45 PM   #2
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I bought these graded pipettes to measure it out:

http://www.amazon.com/gp/product/B00...?ie=UTF8&psc=1

If I am at a PH of 5.6-5.8 I will add a couple ml and recheck until I am in range. This is for 20-25lbs of grain (I do 12 gallon batches). I use the EZ Water Calculator spreadsheat to give me an idea of how much lactic. It is usually pretty close.

I don't taste any lactic in my beers. The sparge water must take almost 10mls in order to bring it down below 6. Still no acidic taste.

What PH meter do you have?

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Old 05-01-2013, 01:02 PM   #3
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I should also note that I plan on starting to use Phosphoric acid in my sparge to ensure that my lighter styles don't get impacted by the lactic. Phosphoric is said to be tasteless.

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Old 05-01-2013, 01:07 PM   #4
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+1 for phosphoric. Lactate comes through loud and clear for me in lighter beers.

I use one of these. Comes with baby tylenol, or a lot of places sell them separately:

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Old 05-01-2013, 01:34 PM   #5
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Quote:
Originally Posted by TyTanium
...
I use one of these. Comes with baby tylenol, or a lot of places sell them separately:
^^This. My vet gave me a 1 mL version a few years ago for dosing our cats. Works perfect.

Where are you guys even finding phosphoric acid? Over the years I've asked more than one LHBS and they typically look at me like I'm crazy. Regardless, I'm satisfied with lactic acid.
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Old 05-01-2013, 01:44 PM   #6
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Duda Diesel

http://www.dudadiesel.com/

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Old 05-01-2013, 01:45 PM   #7
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Quote:
Originally Posted by SpeedYellow View Post
^^This. My vet gave me a 1 mL version a few years ago for dosing our cats. Works perfect.

Where are you guys even finding phosphoric acid? Over the years I've asked more than one LHBS and they typically look at me like I'm crazy. Regardless, I'm satisfied with lactic acid.
Morebeer - Just ordered a couple bottles.

I have also gotten the same reaction at my LHBS.
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Old 05-01-2013, 01:45 PM   #8
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double post

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Old 05-01-2013, 01:54 PM   #9
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Thanks!

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Old 05-01-2013, 07:28 PM   #10
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The medicine syringe mentioned above is good. Another option is a graduated medicine dropper that is typically sold in the infant care area. Those are typically graduated in fine enough units to measure out the doses we typically deal with.

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