"D. J. Gooding" > wrote in message
...
>
> I recently got a pH meter and want to use it also as a titration indicator
for
> TA measurements. I would have supposed that the desired endpoint pH would
be
> 7.0 (neutral). However, I have found one reference that says to use 8.1 -
8.2
> as the endpoint. Another reference says that it is conventional to use
8.2 in
> the US and 7.0 in France. Does anyone know why? Which yields the TA that
I
> really want to use?

If I remember correctly, the 8.2 pH number comes from where phenolphthalein
changes from colorless to pink.

FWIW, I haven't even bothered to measure TA on my wine/juice/must for the
past 15 years or so. I watch the pH very carefully though. That's the
number that really counts in the long term.

Tom S