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朋友新买了一个电热水壶。不过每次水烧开后他都要拔掉电源,问其原因,原来他是担心不拔掉电源,电热水壶就会一直加热,水就反复被烧开。据以往经验,烧的时间越久,水中亚硝酸盐的含量就会增加——亚硝酸盐可能致癌,对身体有害——这样的水也被称为“千滚水”。千家万户正在使用的电热水壶、饮水机,可以反复加热吗?煮开水后,到底要不要拔掉插头?亚硝酸盐不会“无中生有”其实,水里的亚硝酸盐不会凭空产生,一般是由水
Friends bought a new electric kettle. However, after each water boil he must unplug the power, ask the reason why he was worried not unplug the power supply, electric kettle will have been heated, the water is repeatedly boiled. According to past experience, the longer the time of burning, the content of nitrite in the water will increase - nitrite may cause cancer, harmful to the body - such water is also called “a thousand boiling water”. Thousands of households are using electric kettles, drinking fountains, can be repeatedly heated? After boiled water, in the end or unplug the plug? Nitrite will not “In fact ” In fact, nitrite in the water will not be generated , Usually by water