【摘要】 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。方法检出限为0 82μg/L,线性范围为0～20μg/L。结合磷酸三丁酯色谱分离,对水系沉积物国家标准物质进行分析,结果与标准值相符;对w(Ti)为10-6水平的试样检测,其RSD(n=6)≤6 3%。更多还原

【Abstract】 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.The detection limit is 0.82 μg/L and the linear range of determination is 0～20 μg/L for tin.Combined with tributyl phosphate(TPB) chromatographic separation,the method has been applied to the determination of trace tin in national standard reference (water sediment samples).The results are in agreement with certified values.The RSD for tin is ≤6.3%(n=6).更多还原