钪-镧-对氟偶氮氯膦体系共显色效应的研究及应用  

Cocolouration of Scandium-Lanthanum -Chlorophosphonazo-PF and Its Analytical Application

作　　者：曹建明[1] 李红双[2] 侯振雨[3] 罗庆尧[4] 

机构地区：[1]温州医学院化学教研室,温州325003 [2]山东农业大学中心实验室 [3]河南职业技术师范学院 [4]武汉大学化学系

出　　处：《分析化学》1993年第11期1306-1309,共4页Chinese Journal of Analytical Chemistry

摘　　要：本文研究了钪-镧-对氟偶氮氯膦体系共显色效应的光度特性及测定钪的最佳条件,建立了光度法测定痕量钪的新方法。该法的表观摩尔吸光系数为8.57x10^4L·mol^(-1)·cm^(-1),Sc(Ⅲ)浓度在0.0～5.0μg/25ml范围符合比尔定律。将本法用于镁基、铁基合成试样中痕量钪的测定,结果满意。The colouration effect of Sc-La-CPA-PF has been investigated. The polynuclear complex exhibits an absorption maxium at 730nm and its molar absorptivity is found to be 8. 57×104 L. mol-1. cm-1. The molar ratio of each component in complex has been estimated as Sc(Ⅲ):La(Ⅲ): CPA-PF=1 : 1 : 2. Beer's law is obeyed over the range of 0-5.0μg/25ml for Sc(Ⅲ). It can be used for the direct determination of trace Sc (Ⅲ) in synthetic samples.

关 键 词：钪 镧 对氟偶氮氯膦 共显色效应 

分 类 号：O614.321[理学—无机化学]