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Carbon-14 Dating Reveals 5% of Vintage Wines May Be Frauds
Carbon dating isn't used only for such academic pursuits as trying to determine the age of the Shroud of Turin, or figure out how old some rocks are. An anonymous reader writes "Up to 5% of fine wines are not from the year the label indicates, according to Australian researchers who have carbon-dated some top dollar wines."
There is a trick that can be used to date things from the 2nd half of the 20th century. Nuclear bomb testing caused a spike in atmospheric C14, which is rapidly decreasing as it equilibrates with the oceans (among other things). The actual radioactive decay is insignificant on this timescale, and so we can get a pretty good idea if the grapes used to make the wine were plucked after nuclear testing began, and if so what year they were harvested. This technique has also been used in biology to date the "birth" of cells in human tissues.
here's the biology reference: http://www.pnas.org/content/103/33/12564.long
these guys pioneered the tech for use in biology, but then it was popularly applied to wines.
I'm from Argentina. We produce some of the finest wines in the world, specially in Mendoza.
t,
Here, a cheap, average wine that most people drink at home with dinner retails at ~$9 (That is, 9 pesos, or 2.3 Dollars.)
A relatively good wine retails ~$20 (5.2 dollars). At $150 (39 dollars), you can get one of the finest wines you'll ever taste.
The funny thing is, while traveling to the USA, I've recognized bottles that Retail here for ~$35 (9 dollars), with tags of 250 dollars!
So, leaving that aside, yes, you can definitely tell the difference, but it's not all about money. You can definitely tell the difference between any two wines. But, with wine, price is not always = quality. I've tested $200 wines that I didn't like (like the Lamadrid Gran Reserva Malbec) , and $20 (5 dollars) wines that I loved (Like Benjamin Nieto Cabernet Sauvignon)
So, money plays a big role, but there's not a clear relationship between price and quality. It's more of a threshold ... you won't find really good wines very cheap. But above a certain price, there are good and bad wines at a very ample price range
WTF am I doing replying to an AC at 5 A.M on a Friday night?
There are plenty of rocks that contain carbon. Good examples include limestone, marble, coal, and oil shale. The problem isn't lack of carbon. The problem is that the half life of 14C is very short compared to the age of most rocks, so there isn't enough radiocarbon left to date.
There's no point in questioning authority if you aren't going to listen to the answers.
There are alternate radiocarbon techniques that are much more accurate. Nuclear weapons testing resulted in a big spike in atmospheric carbon-14 levels globally, which is dropping rapidly since the test ban treaty. Biologists have been using these techniques for determining cell ages for a couple years.
More info can be found here
upon the advice of my lawyer, i have no sig at this time
Or, since you HAVE read /. for a while, you could read the article. Which describes the measurement of increased C14 levels due to atmospheric fallout after detonation of nuclear weapons, and their subsequent reduction (dilution) due to fossil fuel burning, which in their testing was enough to narrow down to a specific year.
The Australian researcher quoted in the story was co-author of a paper involving forensic use of C-14 dating of wines published in 2004:
U. Zoppi, Z. Skopec, J. Skopec, G. Jones, D. Fink, Q. Hua, G. Jacobsen, C. Tuniz, A. Williams, Forensic applications of 14C bomb-pulse dating, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Volumes 223-224, Proceedings of the Ninth International Conference on Accelerator Mass Spectrometry, August 2004, Pages 770-775, ISSN 0168-583X, DOI: 10.1016/j.nimb.2004.04.143.
(http://www.sciencedirect.com/science/article/B6TJN-4CDWMNK-F/2/b2a003d44396872bd06d5c80443167cd)
and I'm nearly certain I saw published research in the 1990s using C-14 dating to establish wine adulteration, but as it's 3:40 in the morning insomniac me is not going to run down the reference