摘要
在浓度为 0 .0 5mol/LH3PO4 介质中痕量Sn(Ⅱ )对NaH2 PO2 还原罗丹明B(RhB)褪色反应有催化作用 ,褪色程度与Sn(Ⅱ )含量线性相关 ,借此建立了测定痕量Sn(Ⅱ )的分光光度法 .实验表明 ,溶液的最大吸收波长为 5 5 5nm ,方法检出限为 0 .0 35 μg/L ,吸光度变化与Sn(Ⅱ )的质量浓度在 0～ 1.0 μg/ 5 0mL范围内符合比耳定律 .本法可用于测定粉煤灰中的微量锡 .图 1,表 1,参
Trace Sn(Ⅱ) catalyzes decolorization reaction of rhodamine-B (RhB) by reducing with NaH 2PO 2 in 0.05 mol/L H 3PO 4 solution and its catalytic extent is liner to the contents of Sn(Ⅱ).Based on this study,a catalytic spectrophotometric method for determining trace Sn was developed.The results show that the maximum absorption of the complex is at 555 nm and the detection limits of the method is 0.035μg/L for Sn(Ⅱ) .Beer's law is obeyed for Sn(Ⅱ) in the range of 0.0～1.0 μg/50mL.The method has been applied to the determination of trace Sn in fly ash with satisfactory results.1fig.,1tab.,7refs.
出处
《湘潭矿业学院学报》
2001年第3期42-43,共2页
Journal of Xiangtan Mining Institute
基金
原煤炭工业部科技发展项目 (97 368)
