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I bought it a few months ago

I pulled another sample for SO2 analysis of a red wine aged while using the headspace eliminator. Storage vessel was a 5 gallon glass carboy with about 4.8 gallons of wine. Prior to applying vacuum the free SO2 was 34ppm by SC100a, 5 months later 26ppm by the same method. Initially, I left it...

If there were considerable oxidation occurring, wouldn't a accurate measure of free SO2 before and after storage with the headspace eliminator prove this? I have only a couple data points, but after about 3 months of storage, I'm showing consumption of only about 10 ppm of free SO2, on average.