速差动力学光度法同时测定锡和锑的研究

Study on Rate Differential Kinetic Method for the Simultaneous Determination of Tin and Antimony

锡（Ⅳ）和锑（Ⅲ）在酸性介质中，与水杨基萤光酮（ＳＡＦ）、溴化十六烷基三甲铵（ＣＴＭＡＢ）形成三元络合物，但反应速度不同，据此提出用速差动力学光度法同时测定锡（Ⅳ）和锑（Ⅲ）的方法。本法用于铅基合金、铜合金中锡和锑的同时测定，结果满意。

A new rate differential kinetic spectrophotometric method has been developed for the simultaneous determination of tin and antimony ,based on the differential rate of formation of ternary complexes of the two metals with salicylfluorone cetyltrimethylammonium bromide in 0.22 mol/L H 2SO 4 solution.The method of proportional equations is used for data processing.The suitable conditoins for simultaneous determination of Sn(Ⅳ) and Sb(Ⅲ) have been studied.The method has been applied to the analysis of alloys with satisfactory results.