To remind you

Water is the source of life, the water in the human body, about 65% of the body weight. Without water, nutrients in food cannot be absorbed, waste products cannot be removed from the body, and medicines cannot reach their active sites. Water is so closely related to human beings that the importance of drinking water for human health and development is self-evident.

Access to safe drinking water is the basic need for human survival, but there are many arguments that make people worried and worried about the safety of drinking water: placed more than 6 hours of water can not drink, bottled water in the trunk exposed to the sun will cause cancer, hot water with cold water, can not give children to drink... Are these statements true? Let's unravel the truth.

Hot water mixed with cold water, can't give kids?

Some people think that adding some cold water to hot water for children to drink, this practice is very undesirable, because cold water contains a lot of impurities and bacteria. It depends on what kind of water you mean by cool water. For cool water or quality bottled or barreled water, they have been sterilized and are safe, and there are no health problems associated with hot water.

Diarrhea if you drink water that has been left out for more than 6 hours?

How long the water will deteriorate, and there is no fixed time, because the shelf life of the boiled water will be affected by many objective factors, such as the cleanliness of the container of boiled water and the degree of insulation, the storage environment temperature, whether to cover the preservation and the tightness of the container. Therefore, "water can not be drunk for more than 6 hours" is not accurate.

Water that has been boiled many times has nitrous acid, which is toxic to drink?

Nitrite actually refers to nitrite, is a general term for a class of inorganic compounds containing nitrite, which is toxic to humans. In China's drinking water sanitation standards, the requirement for nitrite is not higher than 1 mg/l. Experiments have proved that even after boiling 20 times, the nitrite content is still far below the upper limit of the national standard.

Bottled water in the car exposure can cause cancer?

At present, the plastic bottles used for drinking water on the market are mostly made of polyethylene terephthalate (PET), generally do not add plasticizers, and are very safe when the temperature is less than 120 бу C. Even in the hot summer, the temperature inside the car will rise, and it is impossible to reach 120 бу C. Therefore, as long as the purchase of qualified drinking water produced by regular manufacturers, water sources and plastic bottles meet national standards, you do not have to worry about the release of carcinogens after exposure.

Weak alkaline water is good for health?

The national pH standard for drinking water is for pipeline transportation, not health. China's drinking water index does have a pH value, the range is 6.5-8.5, but this is not a health indicator, but mainly for the consideration of preventing metal pipes from being corroded by liquids with lower pH value.

Long-term drinking of pure water will form an acidic constitution?

In the process of human life activities, the body will inevitably produce acidic metabolites (carbonic acid, lactic acid, etc.) and alkaline products. However, the human body's own regulatory system can carry out acid-base balance, and the content of acid-base substances in the ingested pure water is actually very low. Therefore, drinking pure water can not change the pH of the human body, and the pH of the body fluid of normal organisms is always stable within a certain range.

Home ozone water mechanism out of ozone water can cure disease?

Water is mainly composed of hydrogen and oxygen, no matter how it is treated, it can not have special curative effect. Even some water machines can play a role in activating water molecules and enhancing solubility, but there is no test to prove its effect. Ozone water produced by household ozone machine is usually used as disinfectant water, because ozone is a strong oxide, if long-term drinking this water may cause damage to the oral and gastrointestinal mucosa, and even reduce human immunity, accelerate aging. (Guo Di)

(Source: Science Popularization China)

Plastic Industry Video