锡(Ⅳ)-磺基水杨酸-溴邻苯三酚红-溴化十六烷基三甲基铵胶束混配络合物的显色反应  

The Colour Reaction of Micellar Mixed Ligand Complex of Tin(Ⅳ)-Sulfosalicylic Acid-Bromopyrogallol Red-Cetyltrimethylammonium Bromide

作　　者：罗宗铭[1] 陈凯瑞[1] 杨雪娇[2] 

机构地区：[1]广东工业大学轻工化工学院,广州市东风东路729号510080 [2]东莞出入境检验检疫局,广东省东莞市511700

出　　处：《光谱实验室》2001年第2期155-158,共4页Chinese Journal of Spectroscopy Laboratory

摘　　要：在 p H1.6的氯乙酸缓冲介质中 ,溴化十六烷基三甲基铵存在下 ,Sn( )与溴邻苯三酚红及磺基水杨酸形成 ( 1+2 +1)的胶束混配络合物。络合物的最大吸收波长为 540 nm,表观摩尔吸光系数为 8.9× 10 4 L·mol-1·cm-1。Sn( )浓度在 0— 0 .6mg/ L范围内符合比耳定律。方法的选择性及稳定性都比无磺基水杨酸时好 ,适用于罐头盒中微量锡的测定 ,结果令人满意。In the presence of pH=1.6 chloroacetic acid buffer solution and cetyltrimethylammonium bromide medium,tin(Ⅳ) forms a micellar mixed ligand complex with bromopyrogallol red(BPR) and sulfosalicylic acid(SSal).The composition of tin(Ⅳ),BPR and SSal micellar mixed ligand complex was determined to be 1∶2∶1.The maximum absorption of the complex is at 540nm and the apparent molar absorptivity is 8.9×10 4 L·mol -1 ·cm -1 .Beer's law is obeyed in the range of 0—0.6 mg/L for tin(Ⅳ).The selectivity and stability of this method is higher than that of in the absence of sulfosalicylic acid.The method has been applied to determine trace tin(Ⅳ) in tinned food with satisfactory results.

关 键 词：锡(Ⅳ) 溴邻苯三酚红 磺基水杨酸 胶束混配络合物 分光光度法 测定 罐头盒 

分 类 号：O614.432[理学—无机化学] O657.32[理学—化学]