稀土-锌-茜素氨羧络合剂异核络合物极谱吸附波研究  

Studies on the Polarographic Adsorptive Wave of Isonuclear Complex of Rare Earth-Zinc- Alizarin Complexon

作　　者：李南强[1] 吴大南[1] 

机构地区：[1]北京大学化学系

出　　处：《高等学校化学学报》1989年第6期591-595,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金

摘　　要：本文报道了稀土-锌-茜素氨羧络合剂异核络合物的极谱吸附波的形成条件,络合物组成的测定及电极过程机理的研究。In the 0.2mol/L acetate buffer solution, at pH 4.8, a sensitive adsorptive wave of RE( Ⅲ)-Zn( Ⅱ )-ALC isonuclear complex was obtained by means of single-sweep polarograph with the exception of scandium. The limit of detection is 2.0×10-8 mol/L for light rare earth ions. The composition of the isonuclear complex was determined as RE( Ⅲ ):Zn( Ⅱ ):ALC = 1: 1 :2 by using the polarographic continuous variation method and the analysis of the isonuclear complex precipitate. The electrode processes of the adsorptive wave may be represented as follows.(LaZnL2)ads + 4H+(LaZnLj)ads + H+=La( H) + (ZnL' )ads where L' is the anthrahydroquinone anion of ALC.

关 键 词：稀土异核络合物 极谱吸附波 锌 茜素氨羧络合剂 镧 测定 极谱法 

分 类 号：O614.331[理学—无机化学] O657.14[理学—化学]