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加氯消毒后的自来水中含有13中卤代烃等有害物质,而将有害物质降低到安全范围,烧开水不失为一个好方法。但是当水温刚刚达到摄氏100时,卤代烃和氯仿的含量分别为每升含110微克和99微克,都超过了国家标准;而沸腾3分钟后,这两种物质则分别迅速降为每升含9.2微克和8.3微克,在标准以内。如果让水继续沸煮,卤代烃和氯仿的含量还会有所下降,但是,水中其他不挥发性的物质的数量却会增长,同样对人体有害。因此,烧开水以沸腾3分钟左右为
Chlorinated disinfection of tap water contains 13 halogenated hydrocarbons and other harmful substances, while reducing harmful substances to a safe range, boil water is a good way. However, when the water temperature reached just 100 Celsius, the contents of halocarbons and chloroform were 110 micrograms per liter and 99 micrograms, respectively, which exceeded the national standards. After boiling for 3 minutes, the two substances dropped rapidly to 1 liter Contains 9.2 μg and 8.3 μg, within the standard. If you continue to boil water, halocarbons and chloroform levels will decline, but the amount of other non-volatile water substances will increase, the same harmful to humans. Therefore, boil water to boil for about 3 minutes