催化动力学光度法测定纤维中痕量铁离子

Catalytic Kinetic Spectrophotomter Determination of Trace Fe^(3+) in Fibers

在反应体系中加入活化剂KCNS,使其与Fe^(3+)形成活性络离子,在酸性介质中它能加速显色剂罗丹明B被H_2O_2氧化的反应速率,从而提高测试灵敏度。此方法可测Fe^(3+)浓度范围为(2.149～805.73)×10^(-8)mol·L^(-1)。

KCNS is added in the reaction system as activator. The complex ion that the activator KCNS fonns with Fe3+ can accelerate the reaction rate of the oxidation of the developer Rhodamine B by H2O2 in acid meduim , thus increasing the analysis sensitivity. The method can be used for the determination of Fe3+ in the concetration range (2. 149-805 .73)×10-8 mol·L-1 by using fixed - time method .