三甲氧基苯基荧光酮分光光度法测定锡的研究和应用

Study on the spectrophotometric determination of tin with trimethoxyphenylflurone and its analytical application

研究了新显色剂三甲氧基苯基荧光酮分光光度测定锡的方法。在酸性介质中,表面活性剂吐温 40存在下,试剂与锡形成稳定的橙红色络合物,在510nm处具有最大吸收,其表观摩尔吸光系数ε510=1.48×105L·mol-1·cm-1,锡量在0～0 80μg mL范围内符合比尔定律。方法已应用于铝合金、碳素钢等样品中微量锡的测定。

The new method of the determination of tin with the new chromogenic reagent Trimethoxyphenylflurone(TMOPF) were studied. A stable complex can be formed in acid medium. Its apparent molar absorptivity is 1.48×10~5 L·mol^(-1)·cm^(-1) at 510 nm. Beer′s law is obeyed in the range of 0～0.8 μg/mL for tin. The amounts of tin in aluminum alloy and steel can be determined with satisfactory results.