Hard water has a high mineralcontent. Most of the dissolved minerals are either calcium or magnesium.
水之矿物质含量较高，其溶解性金属以钙及镁为主。
2
Electron probe microanalysis shows that the inhomogeneous distribution ofwatercontent has no direct relation with the chemical composition of the mineral.
电子探针结果表明水含量分布不均与矿物化学成分无直接关系。
3
Methods Fluoride ion (f) -selective electrode method was used to determine fluorin contentof capsicum, tea, corn, rice, toothpaste, tap water and mineral water.