2-(5-溴-2-吡啶偶氮)-5-二乙氨基苯酚与二氯化双(丁氧羰乙基)锡的显色反应及其应用  

Color Reaction of 2-(5-Br-2-Pyridylazo)-5-diethylaminophenol with Bis(butoxycarbonylethyl)tin Dichloride and Its Application

作　　者：罗宗铭[1] 卢业玉[1] 陈焕坚[1] 崔英德[1] 陈达美[2] 

机构地区：[1]广东工业大学化学工程系,广州510080 [2]中山学院,中山528403

出　　处：《分析化学》2001年第8期922-925,共4页Chinese Journal of Analytical Chemistry

摘　　要：在pH 2 .7的HAc NaAc缓冲溶液中和有TritonX 1 0 0存在下 ,二氯化双 (丁氧羰乙基 )锡 (简写为R2 SnCl2 )与 2 (5 溴 2 吡啶偶氮 ) 5 二乙氨基苯酚 (5 Br PADAP)形成 1∶1紫红色络合物 ,络合物的最大吸收波长为 5 0 5nm ;表观摩尔吸光系数 1 0 5× 1 0 5L·mol- 1 ·cm- 1 。R2 SnCl2 中的Sn浓度在 0 .0 6～ 1 .3 0mg L范围内符合比尔定律。方法用于PVC中间产品及污水中R2 SnCl2 的测定 ,结果满意。相对标准偏差分别为 2 4%和 4 5 % ;回收率在 95 4%～ 98 2 %之间。In pH 2.7 acetate buffer solution and in the presence of Triton X-100, the bis(butoxycarbonylethyl) tin dichloride (Ra2SnCl2) reacts with 2-(5-Br-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP) to form a 1: 1 purplish red complex. The maximum absorption of the complex is at 505 nm and the apparent molar absorptivity of the complex is 1.05 x 10(5) L.mol(-1).cm(-1). Beer's law is obeyed in the range of 0.06 similar to1.30 mg/L Sn in R2SnCl2. The proposed method has been applied to the determination of R2SnCl2 in polyvinyl chloride intermediate and waste water with satisfactory results. The relative standard deviations are 2.4% and 4.5% respectively and the recovery is in the range of 95.4%similar to 98.2%.

关 键 词：二氯化双(丁氧羰乙基)锡 有机锡 分析 显色反应 2-(5-溴-2-吡啶偶氮)-5-二乙氨基苯酚 分光光度法 

分 类 号：O657.3[理学—分析化学]