Yesterday I decided to titrate with NaOH to measure TA, but instead of looking at the color change, I used an electrode pH meter to find the end point. I'd like to show you the steps that I followed, and you can tell me if I did it correctly.
- Calibrate the pH meter using a 7.01 buffer solution
- Heat up a sample of wine to remove CO2
- Measure 15 ml of the wine into a container
- Start titrating with NaOH (0.2 N) and measure the pH until it reaches
8.2I used commercial wine (an Australian shiraz) for this experiment, and the thing that confused my is that I only needed 4.3 ml of NaOH to reach the endpoint, which means that the TA is 4.3 g/l as tartaric. Isn't that too low? Don't commercial wines usually have TA closer to 6 g/l? Thanks in advance for your help.