tubed
3.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).
