溴酸钾-酸性品红-硫酸体系催化动力学光度法测定痕量钯

Catalytic Kinetic-Spectrophotometic Determination of Trace Palladium in the System of Potassium Bromate-Fuchsine Acid-Sulphuric Acid

研究了稀硫酸介质中，痕量钯（Ⅱ）对溴酸钾氧化酸性品红反应的催化作用，建立了催化动力学光度法测定痕量把（Ⅱ）的新方法。方法的线性范围为0—0．06μg／25mL，检出限为4．4×10-12g／mL用于合成样品及含铅催化剂的分析，结果满意。

A new catalytic spectrophotometric method for determination of trace palladium (Ⅱ ) has been de-veloped,the method is based on the catalytic effect of palladium(Ⅱ ) on the oxidation of fuchsine acid with potassium bromate in dilute sulphuric acid medittm. The linear range of the method is 0- 0. 06 μg/25mL and the limit of detection is 4. 4×10-13g/mL. The method has been applied to the determination of palladium(Ⅱ) in some catalysts a-nd the results obtained proved to be satis factory.