"William Frazier" > wrote in message >...
>
> Pp - "The juice came in frozen"...there's your answer. I cold soak and
> sometimes freeze juice to lower acid in some of my hybrid juice. You can
> drop a lot of acid out of juice by freezing. I suspect your starting acid
> measurement was low because of this. Then as the juice warmed up and
> fermentation proceeded some of that acid went back into solution. To avoid
> this in the future I would let the juice come to room temperature and stir
> up very well. Then take several samples and run the TA tests. See how
> close your titration results are...if all of the acid is in solution your
> numbers should be very close.
>
> Bill Frazier
> Olathe, Kansas

Hi Bill:

I thought that's what I did, apart from testing several samples. The
juice was at room temperature and I mixed it well. How long do you
have to wait for the acid to go back into solution? Also, for
clarification - I'd need to take the several samples over some time,
right, otherwise I'm just measuring whatever the acid level is at the
moment, no?

Thx,

Pp