文章主要研究地下水在不同温度和CO₂分压条件下碳酸三种存在形式与pH值的关系，以便更有效地对地下水水质资料进行可靠性检查。分析认为HCO₃^-出现峰值的分界pH₀值，纯水在CO₂分压1～10⁵Pa，温度0～30℃时的变化范围为7.92～8.60，碳酸盐岩地下水的变化范围为8.28～8.57。pH₀值随温度的升高而降低。石灰岩和白云岩的pH₀十分接近，碳酸盐岩地区的平衡特性将取决于方解石成分。

The paper discusses the relationship between three forms of carbonate as H₂C0³, HC0₃^- and CC₃^2- and water pH value when the groundwater temperature and partial pressure of C0₂ vary so as to evaluate the reliability of water quality. It finds out that the demarcation point of pH that is called pH_O when the quantity of HCO₃^- reaches maximum, is from 7.92 to 8.60 in water and from 8.28 to 8.57 in open groundwater system of carbonate rock when pressure of CO₂ in groundwater varies from 1 to 10⁵ Pa and the groundwater temperature varies from 0 to 30℃ . pH_O will be lower and lower with groundwater temperature being higher and higher. The pH_O in groundwatar of limestone is almost equal to that of dolomite limestone owing to the solubility of dolomite is very low to calcite. So features of carbonate equilibrium in carbonate rock depend on component of calcite.