有2个网友回答
不能喝。
久置的开水中含氮的有机物会不断被分解成亚硝酸盐,同时,难免有微生物的介入会加速含氮有机物的分解。亚硝酸盐对身体的危害众所周知,它具有很强的与体内血红蛋白结合的能力,会妨碍血液正常的运氧功能,同时也易致癌。
水有保质期,喝生水容易拉肚子,因为水里面会有各种微生物、细菌,而经过高温烧煮,这些微生物、细菌无法生存,都被杀死了。
然而,在开水凉下来的过程中,温度恰恰非常适合微生物、细菌繁殖,时间越久繁殖越多,就像是一盆水放在外面,时间久了也会变质。
多久会变质,会不适合饮用,其实没有固定的时间,因为它还受到客观环境的影响。比如温度,在夏季,气温超过30摄氏度,空气湿度又较高,细菌繁殖较快,极易被污染而引起腹泻。
所以,夏季的隔夜水最好别喝,冬季的隔夜水也最好装在一个有盖的杯中,第二天早晨再以开水兑成温水喝。
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扩展资料:
烧开水的正确方法
平时烧开水,只是把水中的微生物杀死,把水烧开是最好的灭菌方法。但水中微生物的排泄物,尤其是致病菌被杀死后所释放出来的内毒素,在100℃是不能被杀灭的,因此应在水烧开2~3分钟后再关火。
烧开水时,当水烧到接近100℃时,应把壶盖打开,让水中部分残留的挥发性有机物挥发出去,烧开后2~3分钟后再关火。
由于输配管道和储水箱的二次污染问题,所以在自来水管道内存放过久的水不宜直接烧开饮用。清晨应打开水龙头,将水放流5~10分钟后再烧开饮用。流出来的自来水可以用来清洁地板或厕所等。另外,您还可以把水放在容器中自然净化和沉淀后再烧开饮用。
水不能反复烧,最好现烧现喝。反复烧开的水是“千滚水”,是死水,饮用后会加速人体衰老。水存放的时间过长,会受到外界污染,而且隔夜水易老化形成死水。
参考资料来源:/health.people.com.cn/n/2015/0103/c14739-26314545-2.html"target="_blank"title="人民网-一杯水的寿命最长16小时?专家解答隔夜水到底能不能喝">人民网-一杯水的寿命最长16小时?专家解答隔夜水到底能不能喝
参考资料来源:/sz.people.com.cn/n2/2016/0117/c202846-27559557.html"target="_blank"title="人民网-喝水也有这么多讲究为了健康千万不能忽视">人民网-喝水也有这么多讲究为了健康千万不能忽视
少喝隔夜开水的意思是不要喝放置超过24小时开水!
我们知道亚硝酸盐在人体内可形成致癌的亚硝胺。而开水中的亚硝酸盐含量较生水为高。
反复多次煮沸时间过长或超过24小时的开水,亚硝酸盐的含量均明显升高!
开水放置24小时后,亚硝酸盐含量是刚烧开时的1.3倍。
所以最好是现烧现喝或只喝当天的开水。
也不要喝煮沸时间过长的开水,里面亚硝酸盐含量也比较高.
早期后不要马上喝水 因为进食或进水还有消化系统刚刚启动 如果你喝急了 或喝噎了 食道和胃会剧痛 因为刚起运行的不规律 起后洗漱 然后在喝水 最好是温水500毫升 也可以在多些这样会使你一天的新陈代谢有了规律 而且能帮助皮肤排出氧化物 还能促进血液循环 而且可以暖胃 可以略微治疗胃炎 还能促进排泄 增加大肠蠕动 还有可以补充大脑u夜晚睡觉时 缺失的痒份 对眼睛 味觉 还有思维速度都有微量提升 但是这些好处是要养成长期起床洗漱完喝温水的习惯才会得到的 希望对你有所帮助
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