Does boiling water have a shelf life? The answer is yes. This is unpopular scientific knowledge, but it is indeed very useful. Many people don't know that boiled water has a shelf life. They believe that as long as the water is boiled, it is healthy. . How to drink water healthily? Water is an essential substance for the human body. Drinking more water can help the body detoxify. So, how long does boiled water last?
1. The shelf life of boiled water
For healthy people, drinking water with excess bacteria for a long time will have a subtle impact on the body, which accumulates over time, the longer it lasts, the more obvious the impact on health will be.
How “dirty” is the water at night? The total number of bacteria in overnight water is higher than in raw water from thefaucet. Experiments have shown that when water boiled in a kettle is left in the air for 16 hours, the number of E. coli detected in it significantly exceeds the standard and no longer meets current national drinking water standards.
It can be seen that from the second the water is poured into the cup, it enters the countdown to the "assurance" of drinking water. If you are an office worker and you are given a large glass of water after arriving at the office for breakfast, you will not finish the glass of water before leaving work the next day when you arrive at work and you will be thirsty. take the glass and drink again. At this point, you should never expect that water that looked and tasted normal is already bad. What you are drinking is not only water, but also bacteria.
The shelf life of boiled water in air is notthan 4 p.m.; number of. coli in expired water is way over the limit!
Water quality experts have said that if we use an analogy, drinking stale water year after year is the same as eating food with additives year after year. If you don't pay attention to the small details of daily water consumption, your body's healthy environment will continue to be damaged and your physical fitness may deteriorate further and further.
So when you feel fatigue, decreased immunity, etc., while paying attention to food hygiene, you should also check if you are drinking the right water and not let your health be eaten away by a glass of water every day.
2. What is the temperature of boiling water?
When you boil water with a kettle, the boiling point is different in different places. atmospheric pressureEU, the boiling point is 100 degrees Celsius, in plateau areas the temperature is below 100 degrees Celsius. These days, water dispensers, whether to prevent scale buildup or for another reason, almost stop heating when they reach 70 degrees Celsius. This temperature is perfect for brewing tea and will not easily damage the nutrients.
1. Don't drink water that's too hot
Some people like to drink cold water, while others like to drink hot water. They generally mistakenly believe that warmer water is better. , But this is not the case. Experts remind everyone not to drink fresh boiled water that is too hot, usually between 25 and 30 degrees Celsius. That is, drink boiled water cooled to 30 degrees.
2. Boiled water is the best drink
Nowadays, there are different names of purified water, mineral water and drinks.the market, and the advertisements are even more so, so what exactly do people do. What should they choose to drink? In fact, from a health perspective, plain water is the best drink. It does not contain calories and can be directly absorbed and used by the human body without digestion. It is generally recommended to drink lukewarm water below 30 degrees Celsius. not too irritate the gastrointestinal tract, difficult to cause vasoconstriction.
3. How to boil water correctly
1 Boil water for three minutes for the healthiest quality
Almost everyone believes this. that of Drinking water obtained from safe canals poses no health risk as it is clean and will not spoil. But in fact, if you ignore the details of drinking water, no matter how clean it is, it can deteriorate and put your health at risk.
To understand how water deterioratese, you must first start with its source. There are generally two types of water that people drink daily: purified bottled water and boiled water heated at home.
Qualified purified water is treated in strict accordance with national drinking water standards. As long as the transportation link is done well, all indicators will meet the standards. Boiling water in your own home is boiled, but few people know that after boiling the water, you need to continue boiling it for 3 minutes, in order to remove the chloride present in tap water . Turn off the heat after 3 minutes of boiling, because if you boil it too long it will increase the nitrite in the water.
2. Cover and dry in the sun at 25 ~ 30°C.
During the process of boiling water, the harmful substances contained in it should be evaporated and killed, but not me. I think everything will be fine this way, car there are still many health minefields in the process of drinking drinking water.
For example, don't be in a hurry to drink freshly boiled water. It should be exposed to 25℃-30℃ before drinking it. During the natural cooling process, it is conducive to the volatilization of residual chlorine. and calcium and other solid substances. Precipitation softens water quality appropriately. During the cooling process, the most important thing is to keep the lid closed. Likewise, if the lid is not covered when drying boiled water the day before, that glass of water will become a breeding ground for bacteria!
4. What quality of water is healthiest?
1. Pure water is pure water that does not contain impurities and has a conductivity less than 10.
Domestic purified water generally uses RO reverse osmosis membrane technology,which filters impurities in water and contains neither beneficial nor harmful elements, which can quench thirst. Purified water accounts for more than 85% of tank water, and drinking purified water for a long time should attract attention.
Since purified water is pure water, there is no difference in water quality. Therefore, as long as the purified water is standardized, you can choose a better brand such as C'estbon, Binglu, Wahaha or. Jingtien.
2. Mineral water is artificially added with minerals made from pure water.
Magnesium sulfate and potassium chloride are usually added. China's best-selling "Tingyi Mineral Water" has been replaced by "Tingyi Youyue". According to the new national standard, the name of mineral water can no longer be used, and the content of food additives will be indicated on the bottle.
Natural water is surface water or groundwatere. Spring water, mountain spring water and bamboo root water are all natural waters.
Just like mineral water, the new national standard does not allow the he use of natural water, spring water and other names, collectively called drinking water. Nongfu Spring is the most famous natural water in China. C'estbon disagreed with Nongfu's source. C'estbon accused Nongfu Spring of using weakly alkaline water to deceive people, while Nongfu Spring accused C'estbon water of containing no minerals. Ordinary people just need to remember that there are no such things as baseless rumors.
3. Natural mineral water is deep underground mineral water.
The biggest difference with natural water is that the beneficial elements meet the standards of natural mineral water.
Because natural mineral water contains natural minerals and trace elements, thepeople concerned about their health will prefer it.
The most famous domestic natural mineral water is Evian, known for its high price. Although there are many varieties of imported natural mineral waters, the brands are inconsistent and the channels are confusing.
4. The water produced by the home water purifier is pure water.
Home water purifiers generally use RO reverse osmosis membranes and the treated water is pure water.
5. Natural water and mineral water, these two names have been banned by the new national standard.
After the implementation of the new national standards for drinking water, natural water and mineral water will be replaced by drinking water. It also reduces the burden of choice for everyone. Starting next year, there will only be three types of water: pure water, drinking water and natural mineral water.
6. The imported water is generallynatural water and natural mineral water.
Imported water is generally superior to domestic water in terms of technology. Domestic natural water and natural mineral water still use ozone for sterilization, and bromate excess incidents frequently occur. Water imported from Europe and the United States generally uses physical sterilization + aseptic filling, and the standard process is ozone-free.
However, if you choose imported water, don't obsess over expensive water.
The most important thing is the quality of the water, and whether it is suitable for adults. What is suitable for adults may not be suitable for children, and what is suitable for Europeans may not be suitable for Chinese.
Natural mineral water has fewer water resources and is relatively rare and valuable When choosing natural mineral water, you should pay attention to several things:
( 1) Comparez water index settings. , pay particular attention to the impact Five limit indicators for sensitive groups: consumption of lead, cadmium, manganese, nitrate and chemical oxygen.
(2) Calculate the hardness and mineralization of water. These are two elements stipulated in the taste index of water. If a child doesn't like drinking water, the water may not be delicious enough. .
(3) Does natural mineral water meet drinking water standards? Only natural mineral water that meets drinking water standards can drink 2L per day.
7. Buying water is not a beauty contest. Look at the label first, then the body of the bottle.
What do you look for when you look at bottle labels? Take a look at the type, whether it is pure water, drinking water or natural mineral water. Secondly, regarding the parameters, the content of trace elements and the content of indilimited factors are both important. The labeling of imported water is relatively standardized. Imported water is usually marked with specific values, and it is uniformly stated that parameters will fluctuate by approximately 10%. Domestic water is usually marked as a range, which is understandable, but when it is marked between 0.1 and 100 it is difficult to understand. The scariest part is that consumers just look at the bottle and not the label. If the water you buy is not intended for your children's consumption, you can continue to do so blindly.
In summary, if you want to choose water for prolonged drinking, natural mineral water is a good choice, but you should carefully check the trace element content and limit the index content of the bottle when purchasing. . , so that you can choose water suited to your usual consumption.
Lots ofWater on the market costs between one or two yuan and tens of yuan, but in summary, there are only four types of water, namely pure water, natural water, mineral water and natural mineral water. Here are the differences between several types of water:
Purified water is pure water that contains no impurities and has a conductivity less than 10. Household purified water generally uses RO reverse osmosis membrane technology to filter impurities from water. It contains neither beneficial nor harmful elements, which can quench thirst. Purified water accounts for more than 85% of tank water, and drinking purified water for a long time should attract attention.
Since purified water is pure water, there is no difference in water quality. Therefore, as long as the purified water is standardized, you can choose a better brand such as C'estbon, Binglu, Wahaha or. Jingtien.
Waternatural is surface water or groundwater. Spring water, mountain spring water and bamboo root water are all natural waters.
Natural water refers to bottled surface water that requires minimal treatment or spring water, mineral water, and artesian well water formed underground . It is not drawn from the municipal system or public water supply system except for no changes. other than limited treatment (e.g. filtration, ozone or equivalent treatment). It not only removes very few impurities and harmful substances in raw water, but also preserves raw water nutrients as well as minerals and trace elements beneficial to the human body.
Mineral water is water made from pure water and reasonably adds mineral elements such as magnesium, potassium, sulfur and chlorine according to the needs of the human body. Mineral watere is a type of water mainly added by industry in accordance with the regulations and limitations of "Hygiene Standards for the Use of Food Additives" (GB2760-2007). The main goal is to replenish moisture, not nutrition.
After the implementation of the new national standards for drinking water, natural water and mineral water will be replaced by drinking water. It also reduces the burden of choice for everyone. Starting next year, there will only be three types of water: pure water, drinking water and natural mineral water.
Natural mineral water: Natural mineral water refers to underground mineral water formed under specific geological conditions and contained in specific structural geological rock formations. It contains special chemical components or has particular physical properties. Emerging naturally from the depths of the subsoil or collected by drilling,it contains a certain amount of minerals, trace elements or other components. Natural mineral water is formed by deep circulation in the formation and contains national standards.
Currently, the market price of water is determined based on the source of the water and the production process. Generally, the price of several dozen yuan is that of imported water.