How Long After Boiling Water Can You Not Drink? Why?

24 hours later.

Do not drink boiled water after 24 hours. The nitrite content in boiled water is higher than that in unboiled water, and the nitrite content in boiled water that is repeatedly boiled, boiled for too long, and left for more than 24 hours increases significantly, which is not conducive to human health. After 24 hours of resting, the nitrite content is twice that of freshly boiled water.

Nitrite can form carcinogenic nitrosamines in the human body. Patients are advised to drink only boiled water of the day and eat plenty of fruits and vegetables.

Therefore, it is best to drink it now or drink only the boiled water of the day, and do not drink boiled water that has been boiled for too long. Boiling water for 3 minutes can evaporate chlorine and some harmful substances in the water, while retaining trace elements that are beneficial to the human body.

In addition, it is not recommended to drink boiled water again, because the boiled water will cool down as soon as it is boiled, and the nitrite will rise again when it is cold. If you drink this water regularly, the acid can easily accumulate in the body, causing intoxication.

In fact, many people will have the habit of boiling water at home, because drinking boiled water is good for the body, but if you can't drink it all at once when the boiling water is boiled, there may be leftover water, so how long after boiling water can you not drink it? <>

The benefits of drinking boiled water: boiled water can replenish the necessary water of the human body, human metabolism, the transformation of all digestive energy, and the discharge of waste products from the body, which require the participation of water, and it is impossible for the human body to survive without water. In addition, drinking boiled water can also dilute the viscosity of the blood, which is conducive to the dilution of blood viscosity and soil, which is very beneficial to the body.

It is generally not recommended to drink boiled water for 24 hours, because you should drink some fresh boiled water, and do not drink some water that has been left for too long, because fresh boiled water is free of bacteria and has minerals needed by the body. However, if it is too long, the minerals are gone, and there may be some harmful substances in it, so it is not recommended to drink it for 24 hours after boiling water. <>

And some people like to heat boiling water repeatedly, but in fact, it is harmful to heat boiling water repeatedly. Because there are trace amounts of harmful substances in drinking water, some of these harmful substances are volatile, so they can be boiled repeatedly, but some harmful substances are not volatile, for example, if the water is repeatedly boiled, the non-volatile harmful substances will remain in the water, so if the water is boiled repeatedly, the concentration of harmful substances will also increase, so it will be harmful to the human body. <>

Boiled water in the air for a long time will be oxidized, because the microorganisms and bacteria in the air will enter the water, and pollution will occur, so the boiled water is generally not more than 24 hours, overnight boiled water can be drunk, but it is best to cover the water with a lid, so that it is forbidden to contact with the water vapor in the air, so that it is a better measure.

After boiling water for 24 hours, you can't drink it anymore because it has become cold after two days, and it is basically the same as unboiled water.

After boiling water, you can't drink it the next day, because if you leave it for too long, a lot of bacteria will grow in it, and you will get sick if you drink it.

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Analysis: It's better to drink it because it takes a long time to boil. We have to pay attention to:

1) Don't drink boiled and unboiled water

After the tap water is chlorinated, when the water temperature reaches 90C, the content of halogenated hydrocarbons and chloroform rises more than twice the drinking water standard. However, halogenated hydrocarbons and chloroform are volatile substances, when the water temperature is boiled to 100C, that is, gasification and volatilization, which can reach the drinking water standard, and it is advisable to boil for 3 minutes after boiling. Long-term consumption of unboiled water increases the likelihood of bladder or rectal cancer by 38%.

2) Don't drink water that has been boiled for a long time:

Boil water for more than 5 minutes. The concentration of non-volatile substances such as calcium and magnesium and other heavy metals and nitrite in the water quality increases, such as the "retort foot water" or "steamer water" used to steam rice. Heavy metals interfere with the gastrointestinal function of the human body, and are prone to abdominal distension and diarrhea; Nitrite causes hemoglobin in the blood to lose its oxygen-carrying capacity, resulting in hypoxia.

3) Don't drink the water that has been stored for a long time

Cold boiled water that has been cooled for a long time and warm boiled water that has been stored in a thermos for a long time will have a higher nitrite content. According to medical experts, the nitrite content of boiled water stored for 3 days is twice that of the nitrite content of boiled water stored for 1 day.

Therefore, it is best not to store boiled water for more than 1 day to avoid potential harm caused by drinking too much nitrite.

Drinking boiled water is an essential part of our daily life, especially during the cold winter months, a glass of boiled water not only warms up the body, but also helps detoxify the body. However, one thing that many people tend to overlook is that boiled water also has a certain expiration time.

After boiling the water, if it is not drunk as soon as possible, the oxygen in the water escapes and carbon dioxide enters it, causing the pH of the water to drop and become more acidic. In addition, water that is not drunk in time after boiling can easily be contaminated, and bacteria and other harmful substances can also enter it, thus affecting our health.

Therefore, in general, it is best to drink the water within 30 minutes after boiling it to avoid storing it for a long time. If you need to store boiled water, it is recommended to use a sealed thermos flask and drink it within 24 hours. In addition, it is necessary to keep the thermos bottle clean, and regularly clean and disinfect the bags to avoid the growth of bacteria.

In short, drinking boiled water, like any other food, should also pay attention to food safety and hygiene to protect the health of yourself and your family.

1 If you continue to boil for 3 minutes, these two substances will quickly decrease to micrograms and micrograms respectively, reaching the drinking standard. At this time, boiled water can be drunk.

2. Generally speaking, boiling water can be boiled for 2-3 minutes, and generally speaking, boiling water for more than 5 minutes is not recommended to drink.

If boiling water for too long will produce excessive chloroform, if you drink this boiled water for a long time, it will interfere with the function of the human gastrointestinal tract, and eventually lead to diarrhea, diarrhea and other symptoms, and in severe cases, it may also cause cancer.

3. If the boiling water is boiled for a long time, it will concentrate the inorganic salts and heavy metals dissolved in the water and increase their content.

If nitrate ions are boiled in water for too long, they will be reduced to nitrite ions, which can interact with low hemoglobin and methemoglobin in the blood, so that hemoglobin loses its oxygen-carrying capacity and leads to hypoxia in the human body.

What's more, the nitrate ion can react with histamine substances in the human body to produce strong carcinogens - congratulatory notice - nitrite compounds, which directly endanger human health.

4. Boiling water can not be drunk when it reaches 90 degrees Celsius, because the tap water for daily drinking is chlorinated. Chlorine interacts with residual organic matter in water to form toxic carcinogenic compounds such as halogenated hydrocarbons and chloroform.

When boiling water is boiled to 90 degrees Celsius, the content of halogenated hydrocarbons rises to 191 micrograms, and chloroform rises to 177 micrograms, both exceeding the national standard by two times. So you can't drink it.

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.