N-苄基-N′-(氨基对苯磺酸钠)硫脲的合成及与钯的显色反应  

Synthesis of N-Benzyl-N′-(Sodiump-Aminobenzenesulfonate) Thiourea and Its Color Reaction with Palladium

作　　者：郝桂霞[1] 储召华[1] 

机构地区：[1]韩山师范学院化学系,广东省潮州市东山路东丽b区521041

出　　处：《光谱实验室》2011年第3期1123-1126,共4页Chinese Journal of Spectroscopy Laboratory

基　　金：韩山师范学院科研基金项目(413428)

摘　　要：合成了显色剂N-苄基-N′-(氨基对苯磺酸钠)硫脲(BSATu),并研究了其与Pd(Ⅱ)的显色反应。在pH 4.0的醋酸-醋酸钠缓冲溶液中,该试剂与钯离子形成摩尔比为3∶1的棕色配合物,其最大吸收波长为282nm,表观摩尔吸光系数达到4.12×104L.mol-1.cm-1,Pd(Ⅱ)的浓度在0—2.4μg/mL范围内符合朗伯-比耳定律。该法用于测定催化剂中钯的含量,结果满意。A new reagent N-benzyl-N＇-（sodium-p-aminobenzenesulfonate）thiourea （BSATu） was synthesized,and its color reaction with Pd（Ⅱ） was studied.In the medium of pH 4.0 NaAc-HAc buffer solution,the reagent reacted with Pd（Ⅱ） to form a stable pale brown complex with a molar ratio of 3∶1.The apparent molar absorptivity coefficient of the complex was 4.12×104L·mol-1·cm-1 at 282nm.Beer′s law was obeyed in the range of 0—2.4μg/mL for Pd（Ⅱ）.The method was applied to the determination of trace Pd（Ⅱ） in catalyst samples with satisfactory results.

关 键 词：N-苄基-N′-(氨基对苯磺酸钠)硫脲 合成 钯 分光光度法 

分 类 号：O657.32[理学—分析化学]