http://www.bjssdf.com/index.php zh-cn http://www.bjssdf.com/post/338/ <> Sat, 19 Jan 2008 02:42:56 +0000 http://www.bjssdf.com/post/338/ 答：矿泉水经加热或冷藏后都会产生像针尖大小的白色沉淀物，叫碳酸钙，与将钙片捻碎后形成的白色粉末是同一种东西。在地层深处矿泉水中钙是溶解在水中的，水温在19摄氏度左右。矿泉水经矿泉水厂的深井泵汲取到水处理设备中，再经灌装和运输，水温已经变化，钙开始析出。如果再经加热或冷藏，钙的析出增加，这就是我们看到的白色沉淀物。
国家GB8537-1995标准“感官要求”中，特别规定肉眼可见物允许有少量的天然矿物盐沉淀，就是指的上述现象。碳酸钙是人体的重要钙源之一，其人体内的留存率达34%，高于其它钙剂，是价廉物美的补钙剂。

问：喝矿泉水会得结石症吗?
答：不会，结石症是一个病理学名词。它是人体内某些有腔器官或其他导管内形成的坚硬如石的物质。用沿试ph值的方法检测，结石无一例外都属酸性，是体内酸性废物沉积而成。矿泉水的沉淀物主要是碳酸钙，属碱性，医疗上用作抗酸药能中和过多的胃酸并能保护体内溃疡面，包括胃和十二指肠溃疡病。因此喝矿泉水与患结石症无关，相反常喝矿泉水对体内结石有一定的防治作用。

问：什么叫“偏硅酸”，“偏硅酸”对人有什么作用?
答：“偏硅酸”也是国家鉴定矿泉水9项微量元素标准中的一项。“偏硅酸”主要分布于人体皮肤及结缔组织中，人体每天摄入10—12毫克为正常范围，它具有恢复血管弹性、清除血管内壁沉积脂肪的作用，因此保护心脑血管系统正常机能是“偏硅酸”的主要作用。如果人体缺乏“偏硅酸”，心脑血管系统易发生病变，产生动脉硬化、冠心病等疾病。

此外，它还对保护胃肠的溃疡面有特殊效果。矿泉水国家标准中“偏硅酸”含量须达到25毫克/升。

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