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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
引用本文:罗宗铭,陈凯瑞,杨雪娇.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[J].光谱实验室,2001,18(2):155-158.
作者姓名:罗宗铭  陈凯瑞  杨雪娇
作者单位:1. 广东工业大学轻工化工学院
2. 东莞出入境检验检疫局
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。

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
文章编号:1004-8138(2001)02-0155-04
修稿时间:2000年10月16

The Colour Reaction of Micellar Mixed Ligand Complex of Tin(Ⅳ)-Sulfosalicylic Acid-Bromopyrogallol Red-Cetyltrimethylammonium Bromide
LUO Zong-Ming,CHEN Kai-Rui,YANG Xue-Jiao.The Colour Reaction of Micellar Mixed Ligand Complex of Tin(Ⅳ)-Sulfosalicylic Acid-Bromopyrogallol Red-Cetyltrimethylammonium Bromide[J].Chinese Journal of Spectroscopy Laboratory,2001,18(2):155-158.
Authors:LUO Zong-Ming  CHEN Kai-Rui  YANG Xue-Jiao
Abstract:In the presence of pH=1.6 chloroacetic acid buffer solution and cetyltrimethylam monium bromide medium,tin(Ⅳ) forms a micellar mixed ligand complex with bromopy rogallol 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. 9×104 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 determ ine trace tin(Ⅳ) in tinned food with satisfactory results.
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