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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。
In H3PO4 medium, trace amounts of iron (Ⅲ) -catalyzed hydrogen peroxide oxidation discoloration of the acid reaction of fading instructions and the best experimental conditions and kinetic parameters, established a new method for the determination of trace iron. The sensitivity of the method was 6.18 × 109g / L; the determination range was 0 ~ 30μg / L. For a variety of horizontal trace determination of iron to obtain satisfactory results.