How long to boil water to drink, how long to boil water can be drunk

The best thing to boil is between one minute and two minutes, because there are a lot of volatile organic compounds in our water, and the lid can be lifted out in one or two minutes, and some volatile organic matter can be removed and bacteria can be killed, so it is best to master the water in boiling for one or two minutes. If it boils for a little longer, it's not good. Because many of the disinfectants in our water are chlorides, we have some organic residues in our water, and they combine to produce a substance that many people can't see, and the toxic effect of carcinogens increases several times if it is boiled for too long, so don't be too long, now some people mention the problem of repeated boiling of water, how about drinking repeatedly boiled water, after repeated boiling, water is easy to age, that is, our ancients in the past said this, there is the concept of dead water and living water, after repeated boiling, water is easy to age, as we talk about water is active, The activity is reduced, to talk a little deeper, just like we see snowflakes, snowflake several hepdra, snowflake polyhedron, hexahedron water structure, repeated hexahedron this structure has a good affinity for human cells, has a good effect, a large amount of burning time is too long to change, the structure changes this function will be affected, so it becomes stagnant water, we say that the stagnant water living water on the human physiology control intensity problem, then this can be troublesome.

Generally, it can be boiled, and it doesn't matter if it's more than half an hour or an hour, and we still have a few hours to boil the soup!

Water should be boiled for 3 minutes before drinking, because drinking water that is not thoroughly boiled is easy to get cancer.

People in the city drink tap water, and ordinary water from rivers and lakes is chlorinated after being sent to the waterworks to remove impurities such as microorganisms. But at the same time, chlorine interacts with residual organic matter in water to form toxic carcinogenic compounds such as halogenated hydrocarbons and chloroform.

Do not boil for too long means that the time is too long (more than 15 minutes), and boiling for 2-3 minutes after boiling means that you want to open the lid.

These two are not contradictory and are complementary conditions.

The correct and scientific way to boil water is: it is best to boil water with an iron kettle; When the water is about to boil (80-90 degrees Celsius), open the lid, wait for the water to boil for 2-3 minutes, and then turn off the heat, the boiling water should not be boiled for too long, it is best to drink the water boiled on the same day, and the boiling water put on the next day would rather be poured out than drunk again.

Three to five minutes after the water boils is appropriate.

It is best to boil the water once, and it has to be boiled, it is best not to boil the water that has been boiled repeatedly, so that some components of the water itself will be lost!

Leave the water on for three minutes after boiling.

If the water is boiled for a long time, it cannot be drunk, and it is best to leave the water immediately after boiling.

At low altitudes, it only takes 5-10 minutes. At high altitudes, it only takes about 3 minutes. Also, the most scientific way to boil water:

When the water is boiled, open the lid of the pot and let the harmful substances in the water evaporate through the water vapor, so that it can be boiled for another 2-3 minutes.

When the temperature just reaches 100, the content of halogenated hydrocarbons and other harmful substances in the water exceeds the national standard; After 3 minutes of boiling, the content of harmful substances is rapidly reduced to the standard range. If the water is boiled continuously, the amount of halogenated hydrocarbons will decrease. However, there is also an increase in other non-volatile substances in the water, which can also cause harm to the human body.

Therefore, the correct way to boil water is to turn off the high heat as soon as the water is boiling and continue to heat it over low heat. After boiling for 3 minutes, turn it off again and remove a pot of fresh, high-quality purified water.

How boiling water cools quickly.

1.First of all, we need to prepare a basin, whatever it is, and then add water to it.

2.After adding enough water, pour 2 tablespoons of table salt into the water and stir it to make the salt dissolve faster and fully dissolve into the water.

3.Then put the cup of hot water you need to drink into this basin and let it sit for about three minutes.

4.After three minutes this cup of hot water will be cold, and you can drink this glass of water quickly, why? Mainly because the specific heat capacity of edible salt and water is different.

The relative heat capacity of water is greater than that of salt water. As a result, the thermal conduction effect will be faster than that of water. This is based on the principle of physical heat conduction.

When this boiling water is placed in salt water, its thermal conductivity is better. Quickly lowering the temperature is very simple and practical. If the boiling water is too hot and you want to drink it, you may wish to try this method.

After boiling water, it is generally not recommended to drink it for more than 24 hours.

Some studies have found that the nitrite content in boiled water is higher than that of unboiled water, and the nitrite content is significantly increased in boiling water that has been boiled many times, boiled for too long, and placed for more than 24 hours, which is not conducive to human health. After 24 hours of boiling water, the nitrite content is twice that of freshly boiled water, and nitrite can form carcinogenic nitrosamines in the human body. In addition, if boiling water for too long will produce excessive chloroform, long-term drinking of this boiled water will interfere with the gastrointestinal function of the human body, resulting in diarrhea, abdominal pain and other symptoms, and in severe cases, it may also cause cancer.

In addition, it is not recommended to drink re-boiled water, because after the boiled water is cool, it is cold and boiled, and the nitrite in it will rise again.

It is recommended that it is best to drink boiled water and boil it for 3 minutes, because boiling water for 3 minutes can evaporate the chlorine in the water, as well as some harmful substances, while maintaining the trace elements in the water that are beneficial to the human body.

Boil for about 2-3 minutes.

The water must be completely boiled. When boiling water, you won't feel like the water is boiling when you look at the surface of the water. At this time, the water is more toxic and has not been completely boiled.

You should cook it for a while before drinking it. The water should not be boiled for too long. If the water is boiled for too long, it will lead to the aging of the water and the formation of harmful substances.

In order to kill the germs and viruses in the water to the greatest extent, minimize the hardness of drinking water, and reduce the nitrite content in drinking water, the boiling time of boiling water is best controlled at 5-10 minutes. If the boiling time is more than 15 minutes, or the water heater in a public place is repeatedly boiled.

Boiling water needs attention.

1. Smooth exhaust.

First of all, we must pay attention to the smooth exhaust, the whole air circulation must be good, our range hood and other ventilation equipment must be kept in good condition, so that we can exhaust well, will not cause some emergency smoke problems, etc.

2. Rational use of electricity.

The second point is that in terms of electricity, we must pay attention to safe and secure use. All plugs and all outlets must be secured. And then there's these power plants, and so on. It is necessary to ensure that they are energized in a timely manner. If the water boils, the valve should be closed immediately.

3. Prevent burns.

After boiling water for the third time, be sure to take care to prevent burns. When drinking water, you must measure it well to avoid burns, and after the water is boiled, you must unplug the power and turn off the socket in time. Only in this way can its safety be guaranteed.

If it is boiled for more than 5 minutes, it is boiled for a long time, and the concentration of non-volatile substances such as calcium and magnesium and nitrite in the water quality increases, such as the retort water or steamer water for steamed rice. Heavy metals interfere with the gastrointestinal function of the human body, and are prone to abdominal distension and diarrhea, and nitrite makes the hemoglobin in the blood lose its oxygen-carrying function, resulting in hypoxia and hypoxia.

At the same time, I would like to add two other precautions for drinking water:

1. Do not drink water that has been stored for a long time, cold boiled water cooled for a long time and warm boiled water stored in a hot water bottle for a long time will have more nitrite content. According to medical experts, the nitrite content of boiled water stored for 3 days is twice that of boiled water stored for 1 day. It is best not to store boiled water for more than 1 day to avoid potential harm caused by excessive nitrite drinking.

2. Do not drink boiled and unboiled water, after the tap water is chlorinated, when the water temperature reaches 90 degrees Celsius, the content of halogenated hydrocarbons and chloroform rises more than 2 times the drinking water standard. However, halogenated hydrocarbons and chloroform are volatile substances, when the water temperature is boiled to 100C, that is, the gas is disturbed and volatilized, which can meet the drinking water standard, and it is advisable to boil for 3 minutes after boiling.

There is no fixed time.

He Li, a researcher at the Institute of Nutrition and Food Safety of the Chinese Center for Disease Control and Prevention, pointed out that there is no authoritative experimental data to confirm the claim that "the lifespan of boiled water is only 16 hours".

When the water is boiled, the pathogenic microorganisms in it are killed, however, after the boiling water temperature drops to room temperature, microorganisms may multiply in the water, and the longer the time, the more microorganisms will be counted.

However, there is no fixed time for how long the number of microorganisms will exceed the limit and it will no longer be suitable for drinking. Because the shelf life of boiling water will also be affected by many objective environments.

For example, the cleanliness and heat preservation of the container containing water, what is the room temperature, whether it is covered and stored, and the tightness of the container. If boiling water is kept in a thermos with good heat retention all the time.

Then there is no need to worry about microbial reproduction. However, if the container of boiling water is not clean and the opening is placed, the risk of microorganisms exceeding the standard increases.

Unfortunately, there is no experimental data to guide how long boiled water can be stored in various environments. As with many foods, water is safest to drink "fresh" (i.e., freshly boiled).

If you want to prepare a cool boil, it is best to store it in a clean container with good sealing, so as to avoid contamination by bacteria in the air, and do not prepare too much at a time.

These 3 types of water are not drinkable:

1. Raw water. The raw water passing through the water pipes will carry a variety of bacteria and parasites, and the human body cannot kill these bacteria and parasites by itself, which can easily cause acute gastroenteritis, viral hepatitis, parasitic infections and other diseases.

2. Water that has not yet been boiled.

The tap water we usually drink has been disinfected and sterilized. Chlorine-treated water can separate a variety of harmful substances, some of which are also carcinogenic and other dangers.

When the temperature of the water reaches 90 to 100, the content of halogenated hydrocarbons in the water is greatly higher than the national drinking water sanitation standard. When the temperature reaches 100 °C, the harmful substances are greatly reduced with steam.

3. Steamer water.

This water has been repeatedly used and boiled repeatedly, and the nitrite concentration in it will be very high. Drinking this water regularly is likely to cause nitrate poisoning. When limescale enters the human body, it can also cause diseases of the digestive, nervous and urinary systems.

People's Daily Online - The truth about whether you can drink boiled water overnight will be revealed now.

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It would be good. Plain water is the best drink!

Boiled water has a very important conditioning effect on the physiological mechanism of the human body. Drinking a glass of warm boiled water on an empty stomach in the morning is beneficial to the human body, it can not only dilute the blood, reduce blood viscosity, promote blood circulation, but also reduce the risk of blood clots, and prevent the occurrence of cardiovascular and cerebrovascular diseases in the "peak" of heart disease, which is particularly important for middle-aged and elderly people.

From a nutritional point of view, any sugary or functional drink is not as good for your health as plain water.

Pure plain water is the easiest way to quench thirst, it can be metabolized immediately after entering the human body, and has the functions of regulating body temperature, transporting nutrients and cleansing the body.

Experts have found that cool boiled water that is naturally cooled after boiling is the easiest to penetrate the cell membrane to promote metabolism, increase the content of hemoglobin in the blood, improve the body's immune function, and improve the body's ability to resist disease. People who are accustomed to drinking cold boiled water have high dehydrogenase activity in the body, less lactic acid accumulation in the muscles, and are not prone to fatigue.

It's better than drinking unboiled water.