贝塔修正光度法分析微量金属配合物溶液性质研究:铅(Ⅱ)-二溴邻羧基偶氮氯膦多配位显色体系  

Studies on Analysis of Properties of Trace Metal MultiCoordination Complex Solution by βCorrection Spectrophotometry: Pb(Ⅱ)DBOKCPA Coloration System

作　　者：叶桂生[1] 郜洪文[1] 

机构地区：[1]安徽大学化学化工学院,安徽省合肥市230039

出　　处：《光谱实验室》2000年第3期326-329,共4页Chinese Journal of Spectroscopy Laboratory

摘　　要：本文采用双波长 β修正光度法研究铅 ( ) -二溴邻羧基偶氮氯膦 ( DBOK- CPA)多配位显色体系 ,在碱性条件下所生成络合物的组成比 Pb2 +∶ DBOK- CPA为 1∶ 7。配合物的各级真实吸光系数和稳定常数均被测得 ,在 6 30 nm处 ,络合物真实摩尔吸光系数 ε=1 .1 0× 1 0 4 L· mol- 1 · cm- 1 ,络合物累积稳定常数K=3.0 4× 1 0 34( 1 5℃和离子强度 0 .1 )。In this report,the βcorrection spectrophotometric method was applied to the determination of properties of lead multicoordination complex with DBOKCPA.In alkaline solution,the formed complex was expressed as:Pb(DBOKCPA)_7.Results showed that the real molar absorptivity ε=1.10×104L·mol^-1·cm^-1 at 630nm of the above complex.The cumulative constant of Pb(DBOKCPA)_7 was equal to 3.04×10~34 at temperature 15℃ and ionic strength 0.1.

关 键 词：β-修正理论 铅多配位络合物 DBOK-CAP 光度法 

分 类 号：O614.433[理学—无机化学] O657.3[理学—化学]