There are four misunderstandings in drinking water.
There are many unscientific places in our daily drinking water, including at least the following four misunderstandings:
Myth 1: I think the more minerals in water, the better, and the higher the content, the better; Some people think that clear water is enough, and the purer the pursuit, the better.
Error correction: the cleanliness of minerals and water are two standards of healthy water, and it is incorrect to emphasize either side.
Myth 2: Always drink some new water, such as "electrolyzed water" and "oxygen-enriched water".
Error correction: Because these waters are not natural water from a nutritional point of view, they should not be drunk for a long time.
Myth 3: Drinking water is just to quench your thirst.
Error correction: Water is nutritious. Protein, fat, carbohydrates, minerals, inorganic salts and other nutrients are diluted by water in the body and easily absorbed by the human body.
Myth 4: only pay attention to the cleanliness and safety of water.
Error correction: Clean water, safe water and healthy water are three different concepts. Clean water refers to water without pollution; Safe water is not only clean, but also contains beneficial minerals; Healthy water is not only clean and safe, but also meets the needs of human body and is active water.
The five common kinds of water have their own uses.
Pure water-long-term drinking will reduce immunity.
Space water and ultrapure water are essentially pure water. Professor Li Fuxing said that pure water is different from traditional human drinking water in principle. Its advantages are cleanliness and hygiene, and no bacteria and viruses. However, a large amount of drinking will take away useful trace elements from human body, thus reducing human immunity and easily causing diseases, all of which are caused by the water molecule structure of pure water.
Because human body fluids are slightly alkaline and pure water is weakly acidic, if you drink weakly acidic water for a long time, the environment in your body will be destroyed.
Drinking pure water for a long time will also increase the loss of calcium. Small bottles (about 600 ml) of pure water can be drunk occasionally, but it is not suitable for long-term drinking as domestic bottled water. For the elderly, especially those suffering from cardiovascular diseases and diabetes, children and pregnant women should not drink it for a long time.
Mineral water-moderate minerals are healthy water.
Not all mineral water can be used as drinking mineral water, and not all drinking mineral water is healthy water.
Mineral water "mine" and "spring" are indispensable, and drinking water cannot contain minerals. The more minerals, the better. For example, the content of iodide in drinking water is beneficial to human body when it is 0.02-0.05 mg/L, and it will cause iodine poisoning when it is greater than 0.05 mg/L..
The existence of minerals in water does not fully explain the strong vitality of water. Therefore, in order to improve the quality of mineral water, it is necessary to maintain the "activity" of water and maintain the physiological function of water without changing the original mineral elements in natural mineral water.
When consumers choose mineral water, they should choose big manufacturers and famous brands.
Tap water containing beneficial minerals in natural water
Tap water is a kind of natural water, which is safe, and natural drinking water also contains beneficial minerals, which is in line with human physiological functions. If it can be further purified, it can be regarded as a relatively popular healthy water.
Oxygen-rich water belongs to a kind of water for medical research.
Oxygen-rich water means adding more oxygen to pure water. Sounds good. More oxygen will definitely make you more energetic. In fact, oxygen-rich water is a kind of medical research water. Oxygen molecules in this water enter the body, which will destroy the normal division of cells and lead to human aging. However, after oxygen is added to purified water, it is still macromolecular water because of its molecular structure, and it is not easy to be absorbed by cells.
Electrolytic water-must be drunk under the guidance of a doctor.
As for the electrolyzed water that consumers are not familiar with, Professor Li Fuxing explained that electrolyzed water decomposes water into cationic water and anionic water through electrolysis. He said that cationic water, as medical water, must be drunk under the guidance of a doctor, while anionic water is used for disinfection and other aspects. Therefore, ionized water cannot be used as drinking water for normal people.
Barreled water: it is safe to do it properly.
1. When buying bottled water, pay attention to whether there is a test report from the drinking water testing department.
2. It is necessary to distinguish whether the container containing water is a qualified product. Authentic barrels are transparent in appearance, bright and shiny, with light blue or white barrel body, no impurities and no black spots. The barrel is marked with the name, trademark and production date of the manufacturer. The appearance, sealing and anti-counterfeiting marks of good quality bottled water are relatively clean. The outer wall of inferior bottled water is dull, with impurities and many black spots, and there is no manufacturer's logo. Authentic barrels tap the barrel wall with your fingers, with clear voice and strong toughness. However, the inferior barrel with fingers hitting the barrel wall has dull sound, poor falling performance and poor toughness, and is easy to crack and deform during use.
3. Disinfect drinking fountains twice a month in spring and summer, and at least 1 time a month in winter.
Because the water dispenser works on the principle of air pressure, the same amount of air enters the water dispenser while taking water. Even in clean air, there are about 4000 bacteria per square meter. In addition, there are some pollutants such as carbon monoxide and floating dust. Such air enters the drinking fountain, and after a period of accumulation and reproduction, bacteria will reach an alarming number, leading to secondary pollution of water quality. Therefore, we should pay attention to the regular disinfection of drinking fountains.
The disinfection steps are as follows:
Step 1: Unplug the power plug, take down the bucket, first open the drain pipe behind the water dispenser, and drain the remaining water. Then turn on the drinking switch and put the remaining water into the cavity of the drinking machine.
Step 2, clamp the alcohol cotton ball with tweezers, and carefully wipe the inside and outside of the inner container and cover of the water dispenser to remove the stains on it.
Step 3: Dissolve 300 ml of disinfectant (chlorine dioxide powder or liquid, available in pharmacies) in about 2 liters of water, pour it into the inner container of the drinking machine, and let the disinfectant fill the whole cavity, which takes about 10- 15 minutes.
Step 4, turn on all the switches of the water dispenser, including the sewage pipe and the drinking water switch, and drain the disinfectant.
Step 5, continuously flush the whole cavity of the water dispenser with 7-8 liters of clean water, turn on all switches, and discharge the flushing liquid.
Step 6, scrub the back wall of the switch with an alcohol cotton ball.
Step 7: After the water dispenser is disinfected, put a glass of water. If there is no smell of disinfectant, smell it. If there is, drain the water until the smell of disinfectant is gone.
Generally, each barrel of water should be drunk within 7 days after opening. If you haven't finished your drink, you'd better have another one. Once the water in the bucket is found to be green, turbid and precipitated, it means that the water has been seriously polluted. Stop drinking immediately and disinfect the water dispenser.
5. In the morning, after the water dispenser is stopped for 65,438+00 hours, bacteria may breed in the water tank. At this time, it is best to release 2 liters of water from the cold water tank and 65,438+0 liters of water from the hot water tank, so that possible bacteria can be washed out.
6. It is best to place the drinking fountain in a dark place, so as to avoid some organic matters that may exist in the bucket from interacting with sunlight to form moss and accelerate the generation of pollutants.
7. It is recommended to use 3 gallons of bottled water for general household drinking. The company can choose 5 gallons.
Water purifier: making domestic water healthier
Nowadays, many families use water purifiers for advanced treatment of water. When choosing a water purifier, it is best for families to choose a water purifier with "nano-membrane" components. This kind of membrane can filter water well and its price is moderate. Generally choose 800 to 1500 yuan.
It is also common to give priority to activated carbon. Activated carbon can adsorb odor and make water more purified. However, attention must be paid to replacing the filter element at home. Ordinary activated carbon filter should be replaced every three months, otherwise the expired activated carbon in the filter can not only adsorb harmful substances such as microorganisms, but will breed harmful microorganisms.
Tap water: drink on the day of boiling.
If you use the water from the tap water pipe directly, be careful not to let it boil and bubble when boiling, so as to kill the bacteria in the water without producing harmful substances such as chloride. If the tap water treated by household purifier is used, after the water is boiled, open the lid and let the water boil for 3 minutes before turning off the fire, so that most harmful substances will overflow with the steam.
If the tap is just turned on and the water flowing out is turbid, it is necessary to let the accumulated rust and other substances go with the water for a period of time before using it. In addition, it is best to drink the water that was cooked that day. Experiments show that drinking cold boiled water that is naturally cooled and left standing for no more than 6 hours is most beneficial to human health.