铁-过氧化氢-变色酸催化动力学光度法测定痕量铁

Kinetic-Spectrophotometric Determination of Trace Iron With Hydrogen Peroxide-Chromotropic Acid Reaction

本文研究了在H3PO4介质中，痕量铁（Ⅲ）催化过氧化氢氧化变色酸的褪色指示反应及最佳实验条件条件和动力学参数，建立了测定痕量铁的新方法。方法的灵敏度为6．18×109g／L；测定范围0～30μg／L。用于各种水平痕量铁的测定获得满意结果。

A method has been developed for the determination of trace iron(Ⅲ), based on the discoloration of chromotropic acid by hydrogen peroxide in H2PO4 solution under the catalysis of Fe(Ⅲ). The sensitivity of the method is 6.18× 10-9 g/L. The range of determination of iron(Ⅲ) is 0~30μg/L. The method has been applied to the determination of trace iron(Ⅲ) in water samples with satisfactory results.