本文提出一种灵敏而方便的检测方法,即利用L-抗坏血酸与Fe(Ⅲ)-1,10-邻二氮菲复合物反应生成1,10-邻二氮菲-Fe(Ⅱ)复合物,后者在510nm有最大吸收。其摩尔吸收系数为1.1×10~4L/mol·cm,仅为抗坏血酸的一半(2.2×10~4 L/mol·cm)。室温1～2分钟即可达到完全显色。pH在1.5～6.5范围内有最高的灵敏度,实际应用中,由 In this paper, we propose a sensitive and convenient method for detecting 1,10-phenanthroline-Fe (Ⅱ) complex by reacting L-ascorbic acid with Fe (Ⅲ) -1,10-phenanthroline complex, The latter has maximum absorption at 510 nm. Its molar absorption coefficient is 1.1 × 10 -4 L / mol · cm, which is only half ascorbic acid (2.2 × 10 -4 L / mol · cm). 1 ~ 2 minutes at room temperature to achieve complete color. pH in the 1.5 to 6.5 range has the highest sensitivity, in practice, by