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Adjusting Total Acidity in Juice buckets

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nrlightfoot

Junior
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Feb 3, 2010
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I just started fermenting my 4 buckets of Chilean juice yesterday, and I measured the PH and TA but didn't add any acid even though the levels where a little low because the PH seemed pretty low too. All the buckets had started fermenting at least a little bit already, and I didn't heat the samples to drive of co2 before testing, but here are the numbers I measured.

Cabernet Sauvignon: OG: 1.093, PH 3.2, TA: .50%

Malbec: OG: 1.090, PH 3.3, TA: .51%

Carmenere: OG: 1.084, PH: 3.2, TA: .47%

Sauvignon Blanc: OG: 1.100, PH: 3.2, TA: .42%

I'm wondering if I should add acid blend to these wines? If so should I add it now or wait till after fermentation finishes, and should I just follow the recommended levels for the TA or try to adjust it to taste? I also have the individual acids (except for lactic acid) if that would be better than the blend. I'm also planning to do a malolactic fermentation on the red wines, which I read has trouble below a ph of 3.2.

Just to make sure I did the calculations right, the titration for the Malbec used 5.1 ml of .2N NaOH to change the PH to 8.2.
 
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Brintk

Amateur Winemaker
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Feb 23, 2010
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There is a good website that you can go to check your calculations. Since I am not a frequent poster here, I am restricted from posting the URL. However, if you do a web search for "FermCalc Applet Page" it should take you there.

Good luck with your juice buckets. I'm still waiting for mine.
 

Brintk

Amateur Winemaker
Joined
Feb 23, 2010
Messages
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There is a good website that you can go to check your calculations. Since I am not a frequent poster here, I am restricted from posting the URL. However, if you do a web search for "FermCalc Applet Page" it should take you there.

Good luck with your juice buckets. I'm still waiting for mine.
 

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