Recently, a mother in Xi'an, Shaanxi Province, found that the silver bracelet on the wrist of the 1-year-old baby changed color, thinking of the silver needle test poison plot in the film and television drama she usually watched, and found that the child often cried inexplicably at night recently, worried about whether the child was poisoned, so she took the child to the local pediatric hospital for medical treatment.
Image source: Western Decisions
Under the doctor's inquiry, the child's mother remembered that a while ago, the family had broken the thermometer, but it was not properly handled, for the sake of safety, the doctor immediately examined the child, and found that the child's urine mercury exceeded the standard several times, and the hospital immediately arranged for the child to be hospitalized for mercury treatment.
After the hot search, some netizens said that the silver bracelet had made a great contribution, and the child's mother was awakened in time, and some netizens said that wearing silver jewelry that was not in good health would turn black. So can silver really test poison? Is it true that the silver jewelry worn is black because of poor health?
"Silver needle test poison" this kind of bridge, we must have seen in the costume drama, the imperial family and nobles before the meal, the eunuchs around them will use silver needles to insert into the food, if the silver needle turns black, it is poisonous, if there is no change, then the food is not poisonous.
In fact, the silver needle test that everyone saw on the costume drama was indeed effective at that time. Mainly because the main means of poisoning at that time were "arsenic", coupled with the fact that the purification technology of arsenic at that time was not developed enough, arsenic contained a large number of sulfur substances, and sulfur can chemically react with silver metal, making silver metal black.
Therefore, what makes the silver needle black is not all kinds of deadly toxins, but sulfur.
Like in this news, when silver and mercury are mixed, a metallic compound "amalgam" is formed, and amalgam contact with air may also cause color changes.
In fact, the real reason why people wear silver bracelets black is these:
1
Silver occurs naturally in the air to form oxidized silver, which is brown or grayish-black. Or, if the ambient air quality we are in is not good, it will contain some acidic gases such as hydrogen sulfide, etc., and silver will react with sulfur in the air to produce silver sulfide.
2
Sulfur is contained in the sweat of the human body, but everyone's physical condition is different, so everyone wearing silver jewelry will have different results. Some people have a high acidic and sulfur content in their bodily fluids, which can cause the surface of silver jewelry to turn black. People with weak acidic constitutions do not raise silver, and silver is easily blackened.
3
If the usual contact with the item contains high acidity and sulfur, it will also cause the silver jewelry to turn black. For example, perennial smoking, perfume spraying, makeup, often using sulfur soap, and liking to soak in hot springs will affect the color of silver jewelry.
4
Silver and gold cannot be worn together, causing silver to turn yellow and lose its luster.
5
The silver jewelry purchased contains insufficient silver content and contains more other metal elements. These easily oxidized metals are easily oxidized with air, making them black.
So does the blackening of silver have anything to do with being sick?
I think the two types of people who think it's relevant and think it's not related are about five or five. Don't jump to conclusions. Let's start with the reports on biological research.
When our body reacts to immunity, the muscles produce more hydrogen sulfide gas. When sick, our immune system in order to protect our body, will occur a lot of immune reactions, produce more hydrogen sulfide gas, will make the silver jewelry significantly black.
So, for people who are often sick, silver jewelry may be more likely to turn black.
However, the darkening of silver jewelry has nothing to do with illness.
To quote the attending physician of the Department of Internal Medicine of Jiangxi Provincial Hospital of Traditional Chinese Medicine: "Wearing silver jewelry and blackening is mostly related to personal physique, and it has no absolute relationship with health or not." ”
Under normal circumstances, silver jewelry is worn for about half a year, the surface will naturally oxidize, the color becomes dull and lose luster, and almost all silver jewelry cannot be avoided. Therefore, you can't judge your physical condition based on whether the silver jewelry is blackened, and the best way is to go to the hospital for examination.
Comprehensive news, image sources: Western Decision-making, Jewelry Class, Weibo Commentary, Internet
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