1, online transmission of "the harm of high manganese steel kettle"
If the kettle made of high manganese steel is used for a long time, it will decompose the manganese in it, especially when it is used to make and hold acidic food.
If the human body consumes too much manganese for a long time, it will affect the function of the nervous system, and there will be symptoms such as memory loss, lethargy, listlessness and neurological dysfunction.
2. The high manganese steel kettle is dangerous and true.
It's fake.
Although the high manganese steel kettle contains manganese, hot water hardly decomposes manganese in steel, and the melting point of steel is 1300℃- 1400℃. In the manufacturing process, manganese has become a part of steel materials, which is difficult to separate. Therefore, the so-called "manganese poisoning" and "manganese exceeding the standard" do not exist, and the "poison kettle" is just a marketing tool for merchants.
Manganese is one of the essential elements for human body.
Manganese is one of the essential metal elements for human body and plays an important role in the normal growth and development of human bones. Its toxicity is also much lower than that of lead, arsenic, cadmium, nickel and other elements. The recommended or suitable intake of manganese for adults is 4.5 mg per day, and pregnant women should take 0.4 mg more per day. Insufficient intake of manganese in human body will affect nerve development.
3. The maximum tolerance of human body to manganese
For adults, the suitable intake of manganese is 3.5mg/d, and the maximum tolerable intake is10 mg/d. Long-term excessive intake of manganese will indeed do some harm to people's health. If people consume more than this amount of manganese, the symptoms mentioned above will appear.
4. How much manganese will be precipitated when the high manganese steel kettle is boiled?
Manganese is an insoluble element. The maximum amount of manganese precipitated from high manganese stainless steel in a single experiment is 1. 168 mg/L, that is to say, drinking water boiled in this electric kettle every day is about 9.4 liters, which is likely to exceed the maximum tolerable intake of manganese for an adult.
Moreover, the absorption probability of manganese in human digestive system is only 1%~5%, and most of the manganese that enters the gastrointestinal tract through diet will be excreted with feces.
Therefore, general manganese poisoning is caused by respiratory system, mostly for occupational reasons, and manganese poisoning caused by diet is very rare.
5. Healthy boiling water method
1, the water should be completely boiled.
When boiling water, don't think it is boiling just because it is about to boil. At this time, the water is quite toxic and has not been completely boiled. You should cook it for a while before drinking it.
2. The boiling time should not exceed 15 minutes.
In order to kill germs and viruses in water to the greatest extent, reduce the hardness of drinking water and reduce the nitrite content in drinking water, it is best to control the boiling time of boiling water within 5- 10 minutes. If the boiling time exceeds 15 minutes, or the water heater in public places boils repeatedly,
3. Avoid using "Hot Fast" for a long time.
Fast burning water is equivalent to electrolytic water, which will affect the water quality after boiling. Moreover, some inferior products are easy to rust when heated quickly, which will pollute the water quality, and more importantly, there are potential safety hazards such as electric shock.
Let the tap water run for a while before boiling.
If tap water is used to boil water, it should be noted that tap water is chlorinated and disinfected, and the combination of chlorine and organic matter in water will produce carcinogens such as halogenated hydrocarbons and chloroform. When boiling water, take out the tap water and let it burn for a while, which can accelerate the volatilization of harmful substances.
5. Open the lid when the water is boiling.
After the water boils, remember to open the lid to dry for a while. Finally, after the water is boiled, wait for 3 minutes before turning off the fire, so that the chlorine content in the water can be reduced to the standard of safe drinking, which is the real boiled water.