Treetoad - If you're serious about your winemaking you cannot test for acid
using color change as the end point. You need a pH meter that reads to 0.01
pH units. It should have a replacable electrode that can be placed in the
test sample. Titrate to pH 8.2 as an end point. Also, buy a burette that's
calibrated in 0.1 ml increments to add sodium hydroxide solution. You can
get excellent results that are very repeatable with such a system. I buy my
sodium hydroxide and buffers from Presque Isle and have good, consistent
acid testing results.

Bill Frazier
Olathe, Kansas USA

"treetoad" > wrote in message
oups.com...
> Is there an easy way to read acid test results with red must? I heard
> somewhere that you can proportionally reduce your sample, then multiply
> your results. Is this accurate? My problem is not being able to
> determine color change at the right time with any degree of confidence.
> Suggestions?
>