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提出了一种新的绘制φ—ｐＨ 图的方法， 即先求出所有的单变线方程， 再选取某一种组分Ｍｉ 为主组分， 把含有该组分的所有单变线方程两两求解， 求出交点（ φｉ ，ｐＨｉ） ， 然后用化学势约束原理法， 将主组分同其它组分在该点的化学势作比较， 若前者的化学势小于后者， 则该点为所求的三相点。把生成该三相点的所有组分用数组标记， 若任意两个三相点有两种组分相同， 便可连成线。
A new method of drawing phi-pH graph is proposed, in which all the single-variation equations are first obtained and then Mi is selected as the main component. All the univariate equations containing the component (Φi, pHi), and then use the principle of chemical potential binding law, the main component with other components in the chemical potential at this point for comparison, if the former chemical potential is smaller than the latter, the point is For the three-phase point. To generate all the components of the three-phase point with an array of markers, if any two three-phase point has the same two components, they can be connected into a line.