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wine, hydrogen sulfide, copper sulfate
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Jimchip
science forum Guru Wannabe


Joined: 30 Mar 2006
Posts: 117

PostPosted: Sun Apr 09, 2006 5:01 am    Post subject: Re: wine, hydrogen sulfide, copper sulfate Reply with quote

On 2006-04-09, Ron Jones <ron@ronjones.org.uk> wrote:
Quote:
Jimchip wrote:
On 2006-04-08, Dances with Grapes <lotusart@charter.net> wrote:
Greetings:

I just read at: http://www.jancisrobinson.com/winenews/winenews1214
"if you have a glass of wine showing some of these rotten egg,
sulfurous characteristics, putting a copper coin in the glass will
remove the hydrogen sulfide and display the true characters of the
wine"

I don't think 'copper coins' are as easily obtainable as might be
suggested. 'Pennies' (in the U.S) are made of Zn, for example.

You have cents, we have real pennies, you stole the word from us.... ;-)

I note that you did not say I that I have 'sense' Smile


--
In a few more years my nose might lose it too.
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raconte@hotmail.com
science forum addict


Joined: 03 Nov 2005
Posts: 72

PostPosted: Sat Apr 08, 2006 6:17 pm    Post subject: Re: wine, hydrogen sulfide, copper sulfate Reply with quote

Dances with Grapes wrote:
Quote:
Greetings:

I just read at: http://www.jancisrobinson.com/winenews/winenews1214
"if you have a glass of wine showing some of these rotten egg,
sulfurous characteristics, putting a copper coin in the glass will
remove the hydrogen sulfide and display the true characters of the
wine"

Is this just hypothetically true? Could you plop a coin in and it would
take away the smells before you ate your food, or is this something
which would take hours or days to do?

Thank You
Robert
Hypothetically, sure. But this should never happen in commercially

produced wines, as the rest of your quoted article plainly states.
There are an abundance of methods, both ancient and traditional and
newer, more modern, sulfur reducing procedures. The article also
plainly states that a variety of tainted flavors and bad smells are
confused with H2S by novices, so the ol' penny trick is likely to be
overused in these old wives tales anyway.

This subject has come up often enough in my other favorite newsgroup --
rec.crafts.winemaking. Even the people there don't shove pennies into
their wine. There's better methods available even for hobbyists.

Now you mention food ... I'm guessing your considering reducing all H2S
flatulence production, by shoving pennies into foods. That won't work,
foods like eggs, cauliflower, etc already have reduced sulfur
compounds, that are later oxidized by intestinal flora to H2S, you
can't get it all removed with pennies. Nor should you try, you would
only succeed in depriving yourself of dietary sulfur, and give yourself
heavy metal poisoning from excess copper.

Now if I WAS going to use copper metal, I'd strip the insulation off of
some household electrical wire instead of using coinage. Coins are
alloys, often with high levels of zinc or other toxic metals. Wiring
is, by necessity, 99.99+% pure copper, 99.99+% pure copper.
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rekuci@gmail.com
science forum addict


Joined: 22 Sep 2005
Posts: 98

PostPosted: Sat Apr 08, 2006 5:33 pm    Post subject: Re: wine, hydrogen sulfide, copper sulfate Reply with quote

Quote:
I just read at: http://www.jancisrobinson.com/winenews/winenews1214
"if you have a glass of wine showing some of these rotten egg,
sulfurous characteristics, putting a copper coin in the glass will
remove the hydrogen sulfide and display the true characters of the
wine"

Is this just hypothetically true? Could you plop a coin in and it would
take away the smells before you ate your food, or is this something
which would take hours or days to do?

Have you ever tasted a penny? Although theoretically it would react
with some hydrogen sulfide (don't know how quickly), it will probably
impart more of a copper taste to the wine, and the acidity would
accelerate leaching of copper. It takes very little copper to give an
unpleasant metallic taste.

Also, better be a really clean penny, think of all the people and
things that have touched them. When I was a grocery store cashier, I'd
get raw meat juice all over my hands and then hand people change out of
the drawer.
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lotusart
science forum beginner


Joined: 03 Jul 2005
Posts: 6

PostPosted: Sat Apr 08, 2006 8:14 am    Post subject: Re: wine, hydrogen sulfide, copper sulfate Reply with quote

I hope Uncle Al will put in his two cents...
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N:dlzc D:aol T:com (dlzc)
science forum Guru


Joined: 25 Mar 2005
Posts: 2835

PostPosted: Sat Apr 08, 2006 4:04 am    Post subject: Re: wine, hydrogen sulfide, copper sulfate Reply with quote

"Dances with Grapes" <lotusart@charter.net> wrote in message
news:1144464856.654165.24580@g10g2000cwb.googlegroups.com...
Quote:
Greetings:

I just read at:
http://www.jancisrobinson.com/winenews/winenews1214
"if you have a glass of wine showing some of these rotten egg,
sulfurous characteristics, putting a copper coin in the glass
will
remove the hydrogen sulfide and display the true characters of
the
wine"

Is this just hypothetically true? Could you plop a coin in and
it would
take away the smells before you ate your food, or is this
something
which would take hours or days to do?

http://www.winecountryjobs.com/articles/WhatsInThatBottleofWineYoureDrinking.htm
<QUOTE>
When you get a wine that has a slight hint of that rotten egg
smell, drop a penny into the glass and after a minute or two the
H2S smell should drop or be wiped out. Old pennies have more
copper than newer ones and work better.
<END QUOTE>

http://www.coinbooks.org/esylum_v07n33a23.html
<QUOTE>
One of her judging tricks caught the eye of a fellow first-time
judge. They had a wine that was producing a strong sulfur smell.
McKee dropped a penny in the glass, which dissipates some of the
aroma. For that reason, McKee tries to keep a penny minted before
1995, when the copper content was higher. Unfortunately the coin
revealed some other faults the wine had as well, she said.?
<END QUOTE>

http://winecask.blogspot.com/2005_08_01_winecask_archive.html
<QUOTE>
I've also read about an old wine-maker's trick of dropping a
clean copper penny into a glass to eliminate the stinky sulfur
compounds caused by reduction - but, decanting and air will solve
the problem on its own.
<END QUOTE>

http://www.everything2.org/index.pl?node_id=14702
<QUOTE>
Wild bacteria and yeasts can cause undesirable flavors, spoilage,
or vinegar to be produced, therefore, wine is usually sterilized
using sulfur compounds before being inoculated with yeast.
<END QUOTE>

I hope that helps. Looks like it is quick, looks like it is
"common knowledge" (however right it is), and it looks like it
may be necessary because of the process of sterilizing the juice.

David A. Smith
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lotusart
science forum beginner


Joined: 03 Jul 2005
Posts: 6

PostPosted: Sat Apr 08, 2006 2:54 am    Post subject: wine, hydrogen sulfide, copper sulfate Reply with quote

Greetings:

I just read at: http://www.jancisrobinson.com/winenews/winenews1214
"if you have a glass of wine showing some of these rotten egg,
sulfurous characteristics, putting a copper coin in the glass will
remove the hydrogen sulfide and display the true characters of the
wine"

Is this just hypothetically true? Could you plop a coin in and it would
take away the smells before you ate your food, or is this something
which would take hours or days to do?

Thank You
Robert
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