吸光度线性扩展法测定钆  

Ultraviolet Spectrophotometric Determination of Gadolinium by Using Linear Expansion of Absorbance

作　　者：陈励权[1] 李宗伟[1] 

机构地区：[1]兰州大学现代物理系,兰州730000

出　　处：《兰州大学学报（自然科学版）》1992年第2期93-98,共6页Journal of Lanzhou University(Natural Sciences)

摘　　要：本文研究了吸光度线性扩展测定钆的方法.在270～280nm 之间所作吸收曲线,显示272.8～274.6nm 间的峰高和钆浓度呈线性关系,可以用来测定钆的浓度.使用10～100mm 的比色皿,可测定7.5×10^(-5)-6.0×10^(-2)M 范围内的钆.和钆等浓度的 La、Pr、 Nd、Sm、Tb、Dy、Er、Tm、Yb、Lu 和 Y 对测定不产生干扰.Eu、Ho 等含量小于1∶1时也不产生明显影响.In this paper,we have studied ultraviolet spectrophotometric determinationof gadolinium by using linear expansion of the absorbance.The absorptioncurve is made between 270 and 280nm.The determination of theconcentration of Gd(Ⅲ)dy the peak height detween 272.8 and 274.6nm,the peak height is in linear relation with the concentratin of Gd(Ⅲ).When a 10-100mm cuuette is used the conccntration of Gd(Ⅲ)is determinedin the range from 6.0×10^(-2)to 7.5×10^(-5)M.When the concentration ofGd(Ⅲ)is equivalent to that ot La,Pr,Nd,Sm,Tb,Dy,Er,Tm,YbLu.and Y,the determination is not interfered.When Gd:Eu,Ho>1:1,the interference is not evident.

关 键 词：钇 分光光度法 线性扩展 吸光度 

分 类 号：O614.339[理学—无机化学]