微乳液-三甲氧基苯基荧光酮分光光度法测定微量锡  

Spectrophotometric determination of micro tin with trimethoxyphenylflurone in the presence of microemulsion

作　　者：陈文宾[1] 马卫兴[1] 徐国想[1] 许兴友[1] 

机构地区：[1]淮海工学院化学工程系

出　　处：《冶金分析》2007年第3期65-67,共3页Metallurgical Analysis

基　　金：江苏省海洋生物技术重点建设实验室基金项目(2005HS001;010;2006HS020);淮海工学院自然科学基金项目(Z2005014;Z2006001)

摘　　要：研究了在微乳液OP存在下,SnⅣ与三甲氧基苯基荧光酮(TMPF)的显色反应。结果表明,在pH4·0的乙酸-乙酸钠缓冲溶液中,SnⅣ与TMPF形成1:3的紫红色络合物,络合物的最大吸收峰位于552nm波长处,表观摩尔吸光系数ε为1·5×105L·mol-1·cm-1。10mL溶液中,SnⅣ量在0～10μg范围内符合比尔定律。本法用于铜合金中锡的测定,结果满意。The color reaction of reagent trimethoxyphenylflurone （TMPF） with Sn（Ⅳ） in the presence of micromulsion OP was studied, Results showed that the color reagent reacted with Sn（Ⅳ）） to form a stable purple-red complex（3 ： 1） in the medium of HAc-NaAc buffer solution at pH 4.0. The maximum absorption wavelength and apparent molar absorptivity were 552 nm and 1.5×10^5L·mol^-1·cm^-1,respectively. Beer＇s law was obeyed in the range of 0-10μg/10 mL for Sn（Ⅳ）. The method has been applied to the determination of micro Sn（Ⅳ） in copper alloy with satisfactory results.

关 键 词：三甲氧基苯基荧光酮 分光光度法 锡 微乳液 

分 类 号：O657.3[理学—分析化学] O614.432[理学—化学]