How long can one store made up as a liquid? Seems like making up a standard solution so that 1 oz equals a campden tablet would work well.
Potassium metabisulfite?
Mar 11, 2006
3 Replies
Stock solutions only last a few months. You will want to make it strong, like 5%, which is equilivant to 5 tablespoons per quart.
I make mine a lot stronger than that - more like 220g/l. The stuff is very reactive with air, so it needs to be stored in a nearly full, tightly sealed bottle to retain its potency.
20 ml of this solution added to 60 gallons of wine bumps the free SO2 by 10 ppm.Tom S
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I make up a 10% solution - about a liter at a time, and store in brown chem bottles, tighly closed. Even at that, it appears that the solution loses strength, so I refresh if older than a month or so - and either sump or use the older for sanitizing solution.
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