What are silver chopsticks for?

Principle of silver poison detection: among the people, the saying that silver can detect poison is widely circulated. As early as Song Ci, a famous forensic scientist in the Song Dynasty, recorded the silver needle autopsy in Injustice Collection, which was also taken as the criterion by forensic doctors at that time. Today, some people often use chopsticks to test whether food is poisonous or not, and there is an idea that silverware can test poison. The poison mentioned by the ancients mainly refers to the highly toxic arsenic trioxide, and the ancient production technology was backward, resulting in a small amount of sulfur and sulfide in arsenic. When the sulfide contained in arsenic comes into contact with silverware, it can play a chemical role and produce a layer of black "silver sulfide" on the surface of silver needle. Modern arsenic production technology is much more advanced than ancient times. The extract is very pure, no longer accompanied by sulfur and sulfide. The metallic chemistry of silver is very stable, and it does not react with arsenic under normal circumstances. It can be seen that the reason why the ancients used silverware to detect poison was limited by history and science. Some items are not poisonous, but they contain a lot of sulfur, and when silver needles are inserted, they will turn black. On the contrary, some items are very toxic, but do not contain sulfur, such as poisonous weeds, nitrite, pesticides, rat poison and so on. When silver needles touch them, there will be no black reaction. Therefore, the silver needle can not identify poisons, nor can it be used as a tool to detect poisons. Although silver can't detect poison, it can be disinfected. As long as every liter of water contains one milligram of 50 million silver ions, most bacteria in the water can be killed. The mechanism is that silver can form positively charged ions in water, adsorb bacteria in water and gradually enter bacteria, making them lose their metabolic ability and die. Therefore, it is good to make bowls and chopsticks with silver in daily life.