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80后小伙“较真儿”高锰钢电水壶

2016-04-19 16:39:23   千龙网

前不久,网上一则“高锰钢电水壶对人体有害”的消息,让一位科普作家走进公众的视野。这位叫张轩中的“80后”小伙子还真的跟高锰钢电水壶较上真了,他去找核工业北京地质研究院的专家,用高锰钢电水壶烧水来做实验,发现通过煮水析出的锰含量非常微小,还不如食品和自来水等的含量多。

作为一个科普作家,他最引以为豪的是自己与英国著名物理学家霍金的一段采访对话。而2016年年初美国科学家发现引力波的存在,证明了爱因斯坦的预言和霍金宇宙模型理论的正确性。但是,引力波是否会对人体造成危害呢?张轩中又该如何较真呢?

“80后”小伙跟一把高锰钢电水壶较真

不久前,江苏省质监局发布的小家电产品抽检报告检测结果显示,55.6%的电水壶样品及22.2%的料理机、榨汁机、豆浆机使用高锰钢锰含量在10%左右。有专家表示,食品容器加热后会把容器里面的锰溶出来,而锰摄入超过一定标准会对神经系统有损害,如记忆力衰退等。

“这个消息在网上传播很快,引起人们的心理恐慌。”日前,蝌蚪五线谱网站的科普作家张轩中在接受千龙网记者采访时回忆说,他看到这个消息后,就立即赶到核工业北京地区研究院,利用该院的设备做实验来了解事实的真相。

为了搞清楚真相,张轩中先按消息原文的逻辑总结文中所涉及的3个问题,一是电水壶锰含量高、二是加热后会有锰析出、三是锰摄入过量会损害神经系统。而这里对应的关键问题分别是“电水壶是否含锰?锰含量多高才算高?”“电水壶加热是否会析出锰?析出量有多少?”“析出的锰是否会被吸收?摄入多少才算过量?”

“只要有一个环节不满足,这篇文章的逻辑就不成立了。”张轩中告诉千龙网记者,当时,他赶到核工业北京地质研究院,那里不仅为他提供了专业的检测设备、检测手段,还有关键的检测用品——一款食品级304不锈钢电水壶!

通过准备样品、酸化、测量等步骤,张轩中发现结果检测出的锰含量极低。由此,张轩中认为,中国工程院院士、冶金专家、东北大学王国栋教授的说法比较靠谱,因为通过煮水析出的锰含量非常微小,还不如食品和自来水等的含量多。

而析出的锰是否会被人体吸收呢?张轩中介绍说,临床研究表明,有害的情况主要发生在通过呼吸系统摄入过量的锰的氧化物,比如电焊时产生的烟雾。锰中毒的患者多是由职业原因造成,饮食造成锰中毒的病例十分鲜见。因为人体消化系统对于锰的吸收概率只有1%~5%,大部分通过饮食进入到胃肠道的锰会随粪便排出体外。

蝌蚪五线谱网站科普作家张轩中。千龙网记者于振华摄

十年科普戳破“引力波危害论”

张轩中在北京师范大学物理学院读硕士研究生时,学的就是理论物理专业。毕业后,他曾经从事科普记者职业,经常要通过实验来探寻事物的真相。几年前的湖南镉大米超标事件、解酒药到底有没有效果、“海蜇蛰死人事件”等,他都通过查文献、做实验等方式来论证、去伪存真,并及时写出报道告诉人们如何辨别真假信息。

责任编辑:李皓 CN002
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