市场上各种水有什么区别?

2024-11-25 12:35:51
推荐回答(2个)
回答1:

目前市场上饮用桶装水、瓶装水有哪些种类?各种水有何区别?
主要有矿泉水、纯净水、山泉水、矿物质水。①矿泉水:是从地下深处自然涌出或经人工揭露的、未受污染的矿水(含有一定量的矿物质、微量元素或二氧化碳气体,在通常情况下,其化学成分、流量、水温等动态在天然波动范围内相对稳定),它是一种宝贵的矿产资源和天然饮品,所含矿物质和微量元素对人体健康有保健、营养作用。②纯净水:经人工处理后获得的可饮用水,通过蒸馏法、离子交换法、反渗透法等方法去除水中的矿物质、有机成分、有害物质及微生物等加工制成。它最大的特点是不含任何有益的矿物质,也不含有害的杂质。其对人体健康是否有影响,一直是专家争论的话题。③山泉水:是一种天然饮用水,水中含有一定的矿物质和微量元素,但达不到矿泉水的指标要求。山泉水没有国家标准,产品质量主要由生产企业按照企业标准进行控制。④矿物质水:是由纯净水添加少量矿化元素制成。该类水是针对纯净水长期饮用对人体健康不利论断而开发的。目前,国家对此产品尚无统一标准,由企业自己制定标准来控制。有的企业使用矿物质浓缩液配制,也有的企业在水中加化学试剂, 这些添加物质的安全性和有效性都没有进行过论证,含量多少也无科学依据

回答2:

  现在市面上水的种类很多,比如矿物质水、矿泉水、纯净水等,这些水究竟有什么区别?哪种更健康?
  国家食品安全风险评估中心风险交流部研究员钟凯答:矿物质水简单说就是纯净水加少量矿物质,它是自来水经过纯化,然后添加矿物质,经杀菌罐装制得。添加矿物质的目的其实不是为营养考虑,而是为满足消费者对口感的要求。通过添加矿物盐,可以让其口感接近白开水或矿泉水。
  矿泉水是从地下深处自然涌出或钻井采集的,它对水源地有严格要求,需经过地矿部门勘探评价,采取水源地保护措施。矿泉水的价格相对较高,主要是因为水源成本高,而不是因为其中微量的矿物质真有什么神奇的功效。矿泉水中常宣传含有丰富的“微量营养元素”锶、硒等,实际上我的同事测过几种矿泉水,这些物质的含量并不比自来水高,有的甚至还不如自来水。
  纯净水是用自来水为原料,通过离子交换、反渗透、蒸馏等工艺制成。它的硬度低,几乎不含矿物质,烧开后无水垢。
  一般来说,水里面比较常见的矿物质是钠、钾、钙、镁等,也存在其他一些元素,如铁、锌、锰等。不否认这些元素都是人体需要的,但我们获取这些营养元素的主要途径还是一日三餐。其实,水主要就是体内营养物质和代谢废物的搬运工,无论喝什么水都不可能把它当成营养来源。因此只要是符合国家标准的水都可以安全放心地饮用,不存在“哪种水更健康”的问题,消费者不必为此纠结。

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