纯净水、净化水、凉开水、自来水的水质分析及其卫生学意义

目的：分析比较4种常用生活饮用水的水质，为选择健康饮水提供参考。方法：按照国家卫生标准GB5750－85推荐的方法对纯净水、净化水、凉开水、管道自来水进行包括感官性状、一般化学、毒理学、细菌学指标、常量、微量元素在内的39项指标的水质分析，并参照国家卫生GB5749－85和GB17324－1998进行分析比较。结果与结论：按现行国家卫生标准评价；（1）自来水（未处理）、净化水各项指标均符合相应的国家生活饮用水卫生标准、安全卫生。（2）凉开水除铝元素含量超标外，其余亦符合国家生活饮用水卫生标准；（3）纯净水符合国家纯净水卫生标准，但所有指标数值（包括常量及微量元素）均明显低于其他三种饮用水，长期饮用后的健康效应值得深入研究。

Analysis on Quality of Four commonly-used Drinking Waters and Their Hygienical Significance

s:Purpose(Objective):Four kinds of commonly used drinking water were analyzed in order to provide reference for people to select healthy drinking.Methods:The water samples are bottled purified water,filtered tap water,boiled tap water and tubed tap water.Thirty nine parameters of water quality,such as sense character,general chemistry,toxicology,bacteriology,macroelements and microelements,were analyzed with the methods recommended in national health standard(GB5750 85)and compared with the national health standard(GB5749 85 and GB17324 1998).Results and Conclusions:According to the national health standards,the water quality of tubed tap water,filtered tap water accorded with those recommeded in the corresponding national health standards.So did boiled tap water except for the level of Aluminium element.All the parameters including macro microelements of bottled purified water were significantly decreased than those of other three drinking waters,and its health effects should be deeply studied after long term drinking.