People usually use electric kettle to boil water. Some families worry that the water boiled by electric kettle can't be drunk, which will affect their health. Is it really so serious? Let's see with Xiaobian
Is it healthy to use electric kettle to boil water
Nowadays, most of the better quality water bottles are made of stainless steel, and the ingredients of stainless steel water bottles are nickel, chromium, manganese and iron.
What is high manganese steel? It's a kind of high-strength steel used in machinery. It's wear-resistant and impact resistant. It's very difficult to process. Its appearance is not different from ordinary steel. It doesn't rust proof. A large amount of manganese intake will affect your health and can't be used as drinking utensils.
It must be emphasized that manganese is not a "monster". It is an essential trace element of human body. It is a component of connective tissue, bone, coagulation factor, sex hormone, etc. it is indispensable for metabolism of fat and carbohydrate, absorption of calcium, regulation of blood sugar, etc. normal brain and mental function can not be separated from its participation. The recommended or appropriate intake of manganese for adults is 4.5 mg / day, and pregnant women should also take 0.4 mg / day. The lack of manganese intake in human body will affect nerve development, but excessive manganese intake for a long time will also affect nervous system function.
Let's do a relatively shallow calculation. Take the batch of electric kettles with the highest manganese precipitation (1.168 mg / L) as an example. Suppose that the human body will not take in manganese from other ways, and the amount of manganese precipitation from each time the electric kettle is kept the same, then it is possible to drink about 9.4 l of water boiled by this electric kettle to exceed the maximum acceptable manganese intake of an adult every day.
What's the concept? A small 4-liter bucket of drinking water in a supermarket, which can drink more than two barrels a day, and drink like this every day, may affect the nervous system one day. It should also be emphasized that the tolerable maximum intake provided by the "reference intake of Chinese dietary nutrients" is only a reference value. If the intake really exceeds this value occasionally, it may not affect human health. After all, everyone's physique is different.
The most serious safety hazard is scalding. We don't need to worry about the high manganese steel, because the precipitation temperature of manganese is 650 degrees, and the boiling temperature of water is only 100 degrees, so this worry is unnecessary. In addition to the hot mouth of the article, there are also potential safety hazards to be prevented, such as short circuit caused by idle burning, and electric shock caused by exposed power line contacting water.
Precautions for boiling water in electric kettle
Boiling time should not exceed 15 minutes
In order to kill the bacteria and virus in the water as much as possible, reduce the hardness of the drinking water as much as possible and reduce the content of nitrite in the drinking water, it is better to control the boiling time of boiling water within 5-10 minutes. If the boiling time is more than 15 minutes, or like a public place water heater repeatedly boiling.
The water needs to boil completely
When boiling water, you can't see that the water is about to boil. You think that the water is boiling. At this time, the water is more toxic and hasn't been completely boiled. You should boil it for a while before drinking it.
Avoid using 'hot fast' for a long time
The water heated quickly is equivalent to electrolytic water, which will affect the quality of water after boiling. Moreover, some inferior heat is easy to rust, which will pollute the water quality. More importantly, there are potential safety hazards such as electric shock.
When using electric kettle to boil water, some families will worry that drinking water will affect their health. Is it really so serious? Let's talk about it.
Place tap water for a while and then boil it
If you use tap water to boil water, it should be noted that after chlorination and disinfection of tap water, the combination of chlorine and organics in the water will produce halogenated hydrocarbons, chloroform and other carcinogens. When boiling water, connect the tap water and place it for a while before burning, so as to accelerate the volatilization of harmful substances.
Open the lid when the water is about to boil
When the water is fully boiling, remember to open the lid of the kettle and air it for a while. Finally, wait 3 minutes for the water to boil and then turn off the fire, so that the chlorine content in the water can be reduced to the safe drinking standard, which is the real boiled water.
Electric kettle made of stainless steel
Electric kettle is convenient to boil water, but its selection and use also need attention. First of all, we need to buy products with excellent quality. We'd better choose stainless steel, which is safer to boil water. Second, you must drink and add water at any time when you use an electric kettle to boil water, because when the temperature drops to a certain degree, it will automatically heat. If you repeatedly heat a kettle of water, the water quality will not be very good.
Boil the water in a glass
The container is very important for the drinking safety of water. After the water is boiled, if you want to cool it, the glass is the safest, followed by the porcelain bowl or porcelain cup. The plastic container is better not to contain boiled water, which is not only easy to deform, but also easy to dissolve harmful substances when they are hot