Originally Posted by ACbrewer
I use Idaphor with my wine. The only advantage of the metabisulphite is that it helps removed some O2. So when you sanatize for racking or bottling sulphites helps reduce any O2 that might get into it. Now as I said, I always use Idaphor and have no problems. I bet starsan will be the same way. And if you don't get O2 into beer I bet.
Metabisulfite works as an antioxidant IN the wine, not when used to sanitize.
During sanitization SO2 gas is created and that is what sanitized your equipment.