催化光度分析法由于灵敏度高、设备简单、操作方便,故颇为人们所注重.痕量铁的催化光度法测定已有人作了研究.我们发现在氨性溶液中,痕量铁(Ⅲ)对H_2O_2氧化刚果红的反应有强烈的催化作用,以邻菲啰啉为活化剂,采用固定时间法,催化反应与非催化反应的吸光度之差△A与Fe(Ⅲ)的浓度在一定范围内呈良好 Due to its high sensitivity, simple equipment and convenient operation, catalytic spectrophotometry has drawn considerable attention.Determination of trace amounts of iron by catalytic spectrophotometry has been studied.We have found that trace amounts of iron (III) in ammonia solution H_2O_2 oxidized Congo red reaction has a strong catalytic role to phenanthroline activator, using a fixed time method, the difference between the catalytic reaction and the non-catalytic absorbance △ A and Fe (Ⅲ) concentrations were within a certain range good