5-(p-氨基)-苄叉若丹宁光度法测定钯  

Spectrophotometric Determination of Palladium(Ⅱ) with 5-(p-Amino) Benzylidenerhodanine

作　　者：汤峨[1] 石振勋[1] 尹家元[1] 朱利亚[2] 

机构地区：[1]云南大学化学系,昆明市翠湖北路52号650091 [2]昆明贵金属研究所,昆明市北郊上马村650221

出　　处：《光谱实验室》2000年第2期190-192,共3页Chinese Journal of Spectroscopy Laboratory

摘　　要：在 ( 1 + 1 0 )的盐酸介质中 ,Triton X- 1 0 0存在下 ,钯与新试剂 5 - ( p-氨基 )苄叉若丹宁 ( ABR)形成红色配合物的显色反应 ,建立了测定微量钯的高灵敏光度分析法。配合物的λmax=475 nm,ε=9.35 4× 1 0 4 L·mol- 1· cm- 1 ,配合物中 Pd( )与 ABR的组成比为 1∶ 2 ,在 0 - 1 8μg Pd( ) / 2 5 m L 范围内符合比耳定律。方法用于金宝山 -锍合金中微量钯的测定 ,结果满意。A highly sensitive spectrophotometric method for the determination of trace palladium has been developed,based on the reaction of palladium(Ⅱ) with 5 ( p amino)benzylidenerhodanine.In the presence of Triton X 100,palladium(Ⅱ) reacts with ABR to form a red 1∶2 complex in the hydrochloric acid(1+10) medium. λ max and ε of the complex are 475nm and 9.354×10 4L·mol -1 ·cm -1 ,respectively.Beer's law is obeyed in the range of 0-18μg/25mL for palladium.The method has been applied to the determination of trace palladium in Jin Baoshan sulfuric alloy with satisfactory results.

关 键 词：钯 光度法 ABR 显色反应 合金 

分 类 号：TG115.335[金属学及工艺—物理冶金] O614.823[金属学及工艺—金属学]