在聚乙二醇—20000存在下,铱—氯化亚锡—乙基紫显色体系测定铱的研究  

Spectrophotometric Determinetion of Iridium with Iridium—Sncl_2—Ethyl Violet in the Presence of PG-20000

作　　者：吕耀忠[1] 李新民[1] 郭菊凡 张德生 李晖 陆兆兴 周惠文[1] 

机构地区：[1]山西大学化学系,太原030006

出　　处：《分析科学学报》1993年第3期58-61,共4页Journal of Analytical Science

摘　　要：本文研究了在PG20000存在下,铱—氯化亚锡—乙基紫离子缔合显色反应。表现摩尔吸光系数ε_(642nm)=2.3×1O^6L·mol^(-1)·cm^(-1),相关系数为0.9971和0.9994,铱含量在0—1.0和1.0—2.5μg/25mL之间符合比尔定律,在室温下能稳定110分钟。研究了26种外来离子和四种络合剂对本法测定铱的干扰。应用于高纯镍中铱的测定,获得较好的结果。A Highly Sensitive Spectrophotometry for the determination of Iridium has been developed. Beer's law is obeyed in the range of 0-1.0 and 1.0～2.5μg Ir/25mL, The colour sotution is stable in the 110min at room temperature. Iridium forms association Complex with Sncl_2 and Ethyl Violet in abuffer solution of pH3.8 HCOOH—NaCOOH and presence of PG—20000. The molar absorptivity is 2.3×10~6L·mol^-1·cm^-1at 642nm. The relative standard deviation is 3.4％.

关 键 词：乙基紫 铱 缔合物 聚乙二醇 显色 

分 类 号：O614.825[理学—无机化学]