日常生活中,许多家庭都会购买桶装水但是桶装水也是有一定的保质期的,放的时间长了也不卫生。研究表明:撕开封条5天以后,桶装水的卫生状况明显下降,要烧开之后才能饮用。桶装水开封后,空气中的细菌就会随饮水机进入密封的水桶内。桶装水的二次污染是一个很难避免的问题,虽然这些桶装水是达标的,但开封后,尤其是天然矿泉水,相比纯 In everyday life, many families buy bottled water but bottled water also has a certain shelf life, and it takes a long time to put it out of hygiene. Research shows that: after five days of tearing off the seal, the health status of bottled water has obviously dropped and it needs to be boiled before drinking. After unpacking, the bacteria in the air will enter the sealed bucket with the dispenser. Bottled water secondary pollution is a difficult question to avoid, although these bottled water is up to standard, but after opening, especially natural mineral water, compared to pure