【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 ,结果满意更多还原

【Abstract】 A sensitive oscillopolarographic method for the determination of trace palladium based on the complex adsorptive current of the palladium? 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 Na 2CO 3 NaHCO 3 (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 μg/L to 300 μg/L and the detection limit was 2 8×10 -9 mol/L (0.3 μg/L). The method was applied to the determination of palladium in catalyst and industrial waste water with satisfactory results.更多还原