Rene,
Here's what I was thinking- you start out with let's say a cup of must
and boil 10 minutes. Now you end up with 1/2 cup after boiling and then take
your 15ml sample of must. Have you not theoretically double the acid content
per volume? I suppose if you started out with 15ml and then boiled it then
you would have the same amount of acid in the end no matter the end volume,
but I don't think that is what he was saying.
John Dixon
"Rene" > wrote in message
om...
> You measure 5 ml sample, then boil. The idea is that the acids are not
> volatile, it doesn't matter whether the sample afterwards is
> concentrated.
> I agree 10 min is abolutely not necessary for wine.
>
> Rene.
> "J Dixon" > wrote in message
t>...
> > Joe,
> > Might be my logic is off, but it seems that boiling the sample for
10
> > minutes would effectually concentrate the sample and alter the results
of
> > your test. I have put my samples in the microwave usually in a water
glass,
> > brought it to a good boil and then tested. My other method is to stir
> > vigorously or shake the heck out of it in a bottle.
> > John Dixon
> > "David C Breeden" > wrote in message
> > ...
> > > Negodki ) wrote:
> > > >Dave Breeden ) wrote:
> >
> > > >>...have you removed all the CO2? That will falsely raise your TA
> > values.
> >
> > > >Dave,
> >
> > > >1) Will adsorbed CO2 distort the pH value as well, or just the TA?
> > >
> > > Yes, but wine is highly buffered (50% wine, 50% water has the same
> > > pH reading as 100% wine), so the effect is negligible.
> > >
> > >
> > > >2) Can you (or anyone else) suggest a few methods that home
winemakers
> > might
> > > >use for this procedure.
> > >
> > > Find a way to draw a vacuum, or boil the sample, or shake it until
> > > no more Co2 froth occurs.
> > >
> > > Dave
> > >
> > >
> > > >Would the following procedure work? Put the sample in an Erlenmeyer
flask
> > or
> > > >small wine bottle, and seal it with a rubber stopper. Shake the
bottle
> > > >gently. Remove the stopper slowly. Seems like this would get rid of
most
> > of
> > > >the CO2 without any special equipment. Comments?
> > >
> > > Yep!
> > >
> > >
> > >
> > > --
> > > Dave
> > >
> >
************************************************** **************************
> > > Dave Breeden
> >