极谱络合催化波测定钯  

Determination of Palladium by Polarographic Complex Adsorptive Catalytic Wave

作　　者：邹洪[1] 张妮娜[1] 郭启华[1] 钱春燕[1] 朱若华[1] 谷学新[1] 

机构地区：[1]首都师范大学化学系,北京100037

出　　处：《分析化学》2002年第3期280-282,共3页Chinese Journal of Analytical Chemistry

基　　金：北京市教委基金;北京市自然科学基金资助项目 (No .2 2 972 0 0 3 )

摘　　要：在Na2 CO3 NaHCO3 (pH 8.6 )缓冲溶液中 ,钯 与 8 羟基喹啉 5 磺酸形成的络合物在有阴离子表面活性剂十二烷基硫酸钠存在时 ,于 - 0 .72V(vs.SCE)处有一个二阶导数极谱波 ,与没有十二烷基硫酸钠存在时相比 ,峰电流增敏约 30倍 ,钯 浓度在 7.5× 10 -9～ 2 .8× 10 -6mol/L范围内 ,i″p 与钯 的浓度呈线性关系 ,检出限为 2 .8× 10 -9mol/L ,方法用于催化剂和工业废水中钯的测定 。A sensitive oscillopolarographic method for the determination of trace palladium based on the complex adsorptive current of the palladium (II)-8-hydroxyquinoline-5-sulfonic acid ( 8-OXSA) system with an anionic surfactant, sodium dodecyl sulfate (SDS), was developed. With SDS the current response was increased about 30 times compared to that obtained without SDS and the peak potential was at - 0.72 V ( vs. SCE) in the buffer solution of Na2CO3-NaHCO3 (pH 8. 6). Under the optimum experimental conditions the peak current was directly proportional to the concentration of palladium in the range from 0.8 mug/L to 300 mug/L and the detection limit was 2.8 x 10(-9) mol/L (0.3 mug/L). The method was applied to the determination of palladium in catalyst and industrial waste water with satisfactory results.

关 键 词：钯 8-羟基喹啉-5-磺酸 十二烷基硫酸钠 示波极谱法 测定 催化剂 极谱络合催化波 工业废水 分析 

分 类 号：O657.14[理学—分析化学]