Based on the catalytic effect of trace tin on discoloring reaction of neutral red oxidized by potassium bromate in 0.036 mol/L sulphuric acid solution,a method for the determination of trace tin by kinetic spectrophotometry has been developed.

• 基于0 036mol/L的H2SO4介质中,痕量锡对溴酸钾氧化中性红的褪色反应有良好的催化作用,建立了测定痕量锡的催化动力学光度法。