chemist debunks that nasty rumor about moscow mule mugs being poisonous

by:Xianke     2020-07-03
\"I found the press release to be a fear of chemical fear --mongering.
\"In the past few days, Moscow\'s mule has been in the news and the news is not good.
The drink, made of vodka, ginger beer, and lime juice, is known for its copper cup, and is under fire for potentially poisoning its drink.
The Iowa Alcohol and Beverage Division issued an announcement warning about the dangers of a copper cup that traditionally served the cocktail.
\"High concentrations of copper are toxic and cause food poisoning,\" the announcement said.
When the surface of copper and copper alloy is in contact with acidic food, copper may be dipped into food.
\"It sounds bad, especially for copper cups that don\'t have another inactive metal lined.
Two of Amazon\'s top-selling three copper cups are out of line-they are 100% copper.
The third is the nickel lining.
Therefore, contrary to the popular view, not all the popular Moscow mule cups are lined up with non-Copper material.
But even if you have 100-
Percentage Copper Cup, how serious is the risk of being poisoned by your Moscow Mule, in short, the answer is No.
We contacted Trisha Andrew, assistant professor of chemical and chemical engineering at UMass Amherst, whose first reaction to Huffington Post was, \"I found the press release to be a fear of chemical fear --mongering.
Andrews agreed to break it down for us with her chemistry expertise.
\"At any time, when you have any liquid in contact with the surface, the container is likely to be dissolved into the liquid,\" Andrew told Huffington Post . \".
\"With Glass, the dissolution is so slow that you will never see it in our lifetime.
\"But when you have metal containers, like copper-which is easier to dissolve than other metals-this happens faster.
That\'s why the announcement suggests no food with a pH below 6.
0 should be in contact with copper.
Copper is highly reactive, especially when in contact with a liquid with a low pH value.
The pH value of lime juice is 2. 0-2.
4, greatly lower than the level recommended by the Bulletin.
Typical Moscow mule recipes include 1/2 ounces of lime juice, 2 ounces of vodka and 4 to 6 ounces of ginger beer.
It should be noted that the pH value of vodka is between 6. 0-7. 0.
In our own tests, our pH test paper showed that the pH of ginger beer was lower than 6.
0, and the Moscow mule group (
All ingredients and ice included)
Sounded at pH below 6. 0.
So Moscow mules are really corrosive to copper.
Andrew explained what that meant.
\"What happens is that, in particular, acidic solutions dissolve atoms on the surface of the container into the solution and produce ions,\" Andrew explained . \".
\"Dissolved copper is no longer copper in the state of metal, but copper (II)or a copper(I). ” “Copper(I)
\"It\'s very toxic, as we all know,\" Andrew explained . \".
\"But humans need copper (II)
In order to survive in normal biochemical function, in a small amount.
In fact, we have enzymes that are part of our normal biological process, copper (II)
As part of their chemical structure.
In other words, copper is not all bad.
This is not to say that we want to have a cup of lime juice that has been sitting in the copper container for several days, but it does soften slightly the dangerous image that copper dipping may produce.
\"It was thought that in a small group of subjects, the concentration of 30 mg of copper per liter would cause nausea,\" Andrew explained . \".
\"So the question is: during the time the Moscow mule is sitting in a copper cup, her answer will give you a sigh of relief, because there is enough time and acidity to filter copper at 30 mg per liter. \".
Even if you\'re nursing drinks all night, \"it\'s ridiculous depending on the dissolution rate,\" Andrew said . \".
\"Before you start worrying [about] you have to have the copper cup sit in straight lime juice for hours
Copper poisoning.
\"Even if you drink a liter of Moscow mule from a pure copper cup, you probably shouldn\'t, you won\'t even be close to the 30 mg limit.
Now, continue to enjoy another round of Moscow mules.
After all this copper poisoning anxiety, you should get it.
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