本文提出双参数直接逼近法,借助计算机对一组试液进行吸光度测定,即可同时获取二元显色体系的络合物组成、显色剂用量、摩尔吸光系数以及稳定常数等多种重要信息,优于传统方法。该法应用于 Fe(Ⅱ)—邻菲罗啉显色体系,取得了令人满意的结果。文中对有关影响因素进行了初探。 In this paper, a direct two-parameter approximation method is proposed. With the aid of computer, the absorbance of a set of test solution can be measured simultaneously to obtain important information such as composition of complex, amount of chromogenic reagent, molar extinction coefficient and stability constant , Better than the traditional method. This method has been applied to the chromogenic system of Fe (Ⅱ) - o-phenanthroline and has achieved satisfactory results. In this paper, the relevant factors were discussed.