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１引言 萃取动力学分析既有动力学分析的高灵敏度，又能提高其选择性。特别对于室温下进行的催化反应，可以通过固定萃取时间控制指示反应进行的程度，为终止反应和研究反应机理提供了方便。该法用于锡的测定未见报道。本文研究了稀ＨＣｌ介质中，利用锡催化溴酸钾氧化邻氨基酚
1 Introduction Extraction kinetic analysis combines the high sensitivity of kinetic analysis with the improvement of selectivity. Especially for the catalytic reaction carried out at room temperature, fixed extraction time can be controlled to indicate the extent of the reaction, in order to terminate the reaction and study the reaction mechanism has provided convenience. The method for the determination of tin has not been reported. This paper studies dilute HCl medium, the use of tin potassium bromate oxidation of o-aminophenol