Calibrating A pH Meter: Maybe The New Buffer Solution Will Do

I racked and measured four batches the other day, and it gave me the opportunity to size up my new buffer solution. I recorded TA values for three of those batches while I was still using my old buffer solution to calibrate my pH meter, and they shouldn’t have changed much. Here are the data:

Name Old Buffer New Buffer
Rhubarb Wine 4/22/07: 6 g/L 11/10/07: 7 g/L
Oregano Wine 8/12/07: 6 g/L 11/10/07: 5.5 g/L
Grocery Store Chablis 8/23/07: 7 g/L 11/10/07: 6 g/L

The old and new measurements are all within 1 g/L. Since I’m measuring my liquid volumes with the plastic syringe that came with my cheap acid test kit, not pipettes or burettes, I don’t think I can claim accuracy better than 1 g/L. So I’m not going to say the new buffer is great, but any error its causing is pretty small.

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