溶膜预富集-石墨炉原子吸收法测定痕量钯  

Graphite furnace atomic absorption spectrometric determination of trace palladium(Ⅱ) after preconcentration with a solvent-soluble membrance

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

机构地区：[1]首都师范大学化学系,北京100037

出　　处：《分析试验室》2003年第2期21-23,共3页Chinese Journal of Analysis Laboratory

基　　金：北京市教委资助课题 (0 0KJ 0 95 )

摘　　要：强酸性条件下 ,钯 (Ⅱ )与 5 [( 5 氯 2 吡啶 )偶氮 ] 2 ,4 二氨基甲苯 ( 5 Cl PADAT)生成紫红色螯合物 ,该螯合物可与十二烷基苯磺酸钠 (SDBS)生成离子缔合物 ,离子缔合物经 0 .3μm孔径的硝化纤维微孔滤膜富集后 ,于小体积 ( 0 .5mL)的浓硫酸中溶膜 ,用石墨炉原子吸收法 (GFAAS)测定 ,富集倍数可达 2 0 0倍 ,钯含量在 4.69× 1 0 - 1 2 ～ 7.0 9× 1 0 - 9mol/L范围内线性良好 ,检出限为 1 .78×1 0 - 1 2 mol/L。方法用于海水中痕量钯的测定。A new method for the determination of trace palladium(Ⅱ) in seawater by GFAAS was described. It was based on the formation of a palladium(Ⅱ) 5 Cl PADAT sodium dodecylsulfophenylate(SDBS) ternary complex. The ternary complex was collected and preconcentrated on a nitrocellulose membrane filter. The membrane in a small volume of sulfuric acid, and the palladium was determined by GFAAS under the optimized conditions. Good linearity was observed over the range of 4.69×10 -12 ～7.09×10 -9 mol palladium(Ⅱ) with the detection limit of 1.78×10 -12 mol/L. The method was applied to the determination of palladium(Ⅱ) in seawater samples.

关 键 词：痕量钯 测定 溶膜预富集 石墨炉原子吸收法 汽车尾气 滤膜溶解法 

分 类 号：X734.201[环境科学与工程—环境工程] U467.48[机械工程—车辆工程]