- Feb 25, 2017
- Reaction score
- Centerville, Northern Virginia
I thought they used 35%w/v in the formula. I think before I retest it this afternoon I'm going to rack and return it to make sure its homogenized. This is only 3 gallons and if I ruin it (which I don't want to do) I won't loose too much sleep. I'm going to monitor this daily for the next couple weeks without adding any more peroxide just for the sake curiosity. One thing I've often wondered is with vacuum racking whether splashed or not, does it add oxygen or perhaps reduce it?Be careful, don't get carried away with the additions, note that in your article above they recommend using 1% hydrogen peroxide solution with good mixing. "The H2O2 should be added in a dilute form (recommend less than 1% w/v), slowly, with adequate mixing (e.g. tank recirculation) to avoid localised oxidation." The idea here is to selectively oxidize the free so2 and not the wine.
Also remember that any dissolved oxygen introduced from your previous splash racking is still active, and it may take a month or two for this to react with the wine, which will result in further free so2 drop. The theoretical drop of free so2 due to dissolved oxygen is 4 to 1, though in practice it can be anywhere from 2 : 1 to 4 : 1, for example if you dissolved 5ppm oxygen during the splash racking, you should expect to lose 10 to 20 ppm free so2 during the next couple of months.