非有机溶剂液-液萃取分光光度法测定微量钯  

Determination of Microamount of Palladium by Extraction Method without Usuual Organic Solvents

作　　者：王克太[1] 柴凤英 

机构地区：[1]甘肃联合大学化学系,甘肃兰州730000 [2]兰州市七里河区教师进修学校,甘肃兰州730000

出　　处：《甘肃联合大学学报（自然科学版）》2004年第4期38-40,共3页Journal of Gansu Lianhe University :Natural Sciences

摘　　要：研究了聚乙二醇 2000(PEG 2000)水溶液在硫酸铵存在下分为液-液两相的条件和对硝基偶氮氯膦(CPA pN)与钯(II)反应生成的配合物在该萃取体系两相间的分配行为,实现了钯(II)的定量萃取分离.在此基础上建立了非有机溶剂液-液萃取分光光度法测定微量钯(II)的新方法.该方法的检出限为0.03μg/mL,线性范围为0.09～1.5μg/mL,用于铂钯二次精矿和人工合成样品中微量钯的测定,结果令人满意.The favorable distribution equilibrium of the complex of Pd(II)-CPA-pN between the two phases of PEG-2000-(NH_4)SO_4-H_2O extraction system was investigated. In this paper,the calibration curve is linear in the range from 0.09～1.5μg/mL and the detection limit is 0.03μg/mL. The method proposed in this paper has been applied to determine microamount of palladium in Pt-Pd refined ore and artificial samples with satisfactory results.

关 键 词：非有机溶剂 液-液萃取 分光光度法 测定 钯 硫酸铵 

分 类 号：O614.823[理学—无机化学] O657.3[理学—化学]