What's the difference between bottled water on the water dispenser and small bottles of mineral water bought in the supermarket?

Barreled water contains mineral water, which can be divided into pure water, mineral water and mineral water (made by artificially adding minerals to pure water).

Different compositions:

1, there are many kinds of bottled water sold in the market, such as pure water, mountain spring water, mineral water, mineralized water, activated water and ionized water. Due to different water sources and different production processes, the types and contents of trace elements in different kinds of bottled water are also very different. Some bottled water sources are natural groundwater, such as mineral water and mountain spring water; Some are city tap water, which is processed into bottled water, such as purified water, distilled water and ionized water.

2. China's national standard for drinking natural mineral water stipulates that drinking natural mineral water is unpolluted underground mineral water that naturally gushes out from the depths of the ground or is artificially exposed; Contains a certain amount of mineral salts, trace elements and carbon dioxide gas. Take metasilicic acid, lithium and strontium in natural mineral water in China as an example. These elements have biological functions similar to those of calcium and magnesium, and can promote the growth and development of bones and teeth.

Extended data

1, the correct way to drink bottled water:

(1) It is best to drink unopened bottled water within 10 days.

(2) Barreled water should not be placed in direct sunlight.

(3) The cleaning of drinking fountains is an indispensable part to ensure the hygienic index of bottled water. It is generally recommended to clean and disinfect once every 0/-2 months.

(4) Pure water and mineral water should be drunk alternately.

2, the correct way to drink mineral water:

(1) When drinking mineral water, it is not advisable to heat, cold drink or slightly warm, let alone boil it. Because mineral water generally contains more calcium and magnesium and has a certain hardness, calcium and magnesium are in ionic state at room temperature, which is easy to be absorbed by human body and plays a good role in supplementing calcium. If calcium and magnesium are easy to generate scale when boiling and precipitate with calcium carbonate, they will not only lose calcium and magnesium, but also cause sensory discomfort, so the best drinking method of mineral water is to drink at room temperature.

(2) Infants should not drink mineral water: For infants, the mineral content in each liter of water should not exceed 100 mg, in which sodium should be less than 20 mg and fluorine should be less than 1.5 mg. Exceeding this threshold may pose a threat to the kidneys of newborns. Obviously, most mineral water is too hard for children.

3. When drinking bottled mineral water, you should pay attention to the following matters:

(1) The water dispenser must be placed in a cool and dark place, and never exposed to direct sunlight, so as not to breed green algae. If there are difficulties, measures should also be taken to cover the bucket to avoid light.

(2) It should be drunk within 2-4 weeks when the barrel is opened in autumn and winter, and within 7- 10 days in spring and summer.

(3) Don't electrify and heat the water dispenser for a long time, and boil it repeatedly. Repeatedly boiled water is not suitable for drinking because of the increase of nitrite.

(4) Used empty barrels should be put in a clean place. Don't pour dirty water into it, and don't throw dirty things (such as cigarette butts) into it, which makes it difficult to clean and disinfect the mineral water plant.

(5) Water dispensers should be disinfected regularly, preferably once every six months. Avoid secondary pollution and ensure that drinking water is safe, hygienic and healthy.

(6) Once water produces bacteria, it can be heated to destroy them.

Baidu encyclopedia-mineral water

Baidu encyclopedia-barreled water