有色絡合物溶液中加入新的配位体,由于絡合竞爭的結果,光密度減弱。根据这种反应,用有色絡合物为指示剂可測定无色絡合物的稳定常数。但前人的工作主要是在溶液中指示絡合物与欲測絡合物都只限为一种,对双方同时存在几种的体系缺乏研究。此外,目前它还无一般的处理方法。本文建議一种单核絡合物的近似处理。 The addition of a new ligand to the colored complex solution diminishes the optical density as a result of complexation competition. According to this reaction, the stability constant of the colorless complex can be determined using a colored complex as an indicator. However, the work of the predecessors mainly indicates that the complex and the complex to be measured in the solution are only limited to one type, and there are no studies on the simultaneous existence of several systems in both countries. In addition, it currently has no general treatment. This paper suggests an approximation of a mononuclear complex.