钯(Ⅱ)与偶氮氯膦Ⅲ的显色反应测定微量钯的研究及应用  

Study on the Color Reaction of Palladium with Chlorophosphonazo Ⅲ and Its Application

作　　者：刘锡林[1] 林安平[1] 朱鑫[1] 

机构地区：[1]甘肃教育学院化学系,甘肃兰州730000

出　　处：《分析测试技术与仪器》2001年第2期75-77,共3页Analysis and Testing Technology and Instruments

摘　　要：钯 (Ⅱ )与偶氮氯膦Ⅲ在硫酸介质中可形成 1∶1的蓝色配合物 ,其最大吸收波长位于 6 44nm处 ,表观摩尔吸光系数ε64 4=2 .4× 10 4 L/(mol·cm) ,钯含量在 0 .1～ 1.5mg/L范围内符合朗比定律 .该法简便、快速 ,可在水相中直接测定微量钯 .用于含钯精矿、阳极泥等样品中钯含量的测定 。The color reaction between palladium and chlorophosphonazo Ⅲ has been studied. It was found that palladium reacts with chlorophosphonazo Ⅲ to form a 1∶1 blue complex in H\-2SO\-4 medium. The complex exhibits a maximum absorption at 644 nm with an apparent molar absorptivity of 2.4×10\+4 L/(mol·cm). Beer's law is obeyed in the range of 0.1～1.5 mg/L Pd(Ⅱ). The method proposed was applied to the determination of palladium in refined ore and anode mud samples with satisfactory results.

关 键 词：钯 偶氮氯膦Ⅲ 分光光度法 显色反应 微量分析 测定 

分 类 号：O614.823[理学—无机化学] O657.32[理学—化学]