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kajolo
 
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Default new program for predicting wine acidity changes

I've been conversing with a gentleman from New Zealand, Dr. Johan Van
Schalkwyk (a PhD chemist) for over a year now, and as a result he has
developed a program for predicting wine acidity changes.

The program asks you for the existing TA, pH and SG values, as well as an
estimation of the existing acid composition (malic, lactic, succinic,
citric, acetic, tartaric), it asks you for the desired pH, and then
predicts how much tartaric or malic acid to add to achieve that goal, and
what the TA will be depending on what proportions of tartaric to malic you
add.

If you need to raise the pH, it will predict how much potassium
bicarbonate to add, and what the TA will be after the addition. If you
expect a malo-lactic fermentation, it will predict the ending TA after the
MLF.

There have been several books written which include analysis of wine acid
compositions, which can be used as guides if one lacks the laboratory
facilities for an exact analysis. (As a home winemaker, I do not have
access to these facilities.)

We think his new program is ready for some critical review.
Please check it out at:

<http://www.anaesthetist.com/mnm/wine/index.htm>

Dr. Schalkwyk has been very helpful, and would be willing to work on
improving this program (when he has the spare time!).

For some interesting background into what makes Dr. Schalkwyk qualified to
write such a program (he is not a wine maker), check out this link:

<http://www.anaesthetist.com/icu/elec/ionz/Stewart.htm>

Please let us know what you think of his program!

Regards,

John Wiedenheft


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