在聚乙二醇-20000存在下锇——氯化亚锡——亮绿体系高灵敏度显色反应的研究  

STUDY ON ULTRASENSITIVE COLOUR REACTION DETERMINATION OF TRACE OSMIUM BY Os-TIN(Ⅱ) CHLORIDE-LIGHT GREEN SYSTEM IN THE PRESENCE OF PG-20000

作　　者：陆兆兴 周惠文[1] 吕耀忠[1] 李晓红[1] 刘铭[1] 

机构地区：[1]山西大学化学系

出　　处：《山西大学学报（自然科学版）》1993年第4期422-426,共5页Journal of Shanxi University(Natural Science Edition)

摘　　要：本文研究了在聚乙=醇-20000存在下,Os(Ⅳ)-SnCl_2-亮绿体系水相测定痕量锇,ε_(427)=7.4×10~6L·mol^(-1)·cm^(-1),锇含量分别在0～0.265和0.265～0.80μg/25ml范围内,遵守比尔定律,相关系数分别为0.9990和0.9967。标准偏差s=±0.0056,相对标准偏差为1.2％.共同离子的干扰较详细地做了研究,并用于合成试样中痕量锇的测定。A Ultrasensitive Spectrophotomentry for the determination of Osmium has been developed. In a medium 2.4～3.6mol/L HCl and in the presence of PG-20000, Osmium forms association complex with SnCl_2 and Light green. The molar absorptivity is 7.4×10~6 L.mol^(-1). cm^(-1) at 427nm. Beer's law is obeyed for o～a 265 and 0.265～0.80μg/25ml of Osmium. The colour solution is stable in the 2 hour at room temperature. The effects of 29 foreign ions on the determination are also discusseed.

关 键 词：锇 缔合物 氯化亚锡 聚环氧乙烷 

分 类 号：O614.824[理学—无机化学]