Ferm calc advice..so2

Discussion in 'Tutorials, Calculators, Wine Logs & Yeast Charts' started by porkchopmessiah, Jun 25, 2019.

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  1. Jun 25, 2019 #1

    porkchopmessiah

    porkchopmessiah

    porkchopmessiah

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    Ok...so I got legit and bought a vinmetric analyzer...was getting near where I hoped to bottle my first grape wine from a bucket...
    5 gallon carboy
    After adjusting acid I got it at 3.65ph
    Did the free so2 titration and came up with 22...
    Using 0.8 target molecular for red wine
    This is how ferm calc spit out my additional Screenshot_20190624-203330.jpg does that look legit 1.12 grams? And the equilibrium constant is supplied?
     
  2. Jun 25, 2019 #2

    Johnd

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    Looks fine...you’re already at 22, and the chart recommends 35 ppm, you don’t need much. For reference, 1/4 tsp of sulfite is right around 2g, so your addition is a bit more than 1/8 tsp in 5 gallons.
     
  3. Jun 25, 2019 #3

    stickman

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    Nothing wrong with using .8 molecular if you want extra protection, but .5 molecular should calculate to around 35 ppm free.
     
  4. Jun 26, 2019 #4

    mainshipfred

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    I use .8 for whites and .5 for reds but always go slightly above those numbers.
     
  5. Jun 26, 2019 #5

    porkchopmessiah

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    Also, does adding sulphite change the ph slightly? After adding it went from 2.65ph to 3.58....thought that was odd...checked with 2 meters both calibrated ....
     
  6. Jun 27, 2019 #6

    mainshipfred

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    It went frim 3.65 not 2 65 to 3.58.that could be a temperature variation.
     
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  7. Jun 27, 2019 #7

    porkchopmessiah

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    Yeah...my bad...3.65 to 3.58
     

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