镓-荧光镓极谱络合吸附波的研究  

Studies on Polarographic Adsorptive Complex Wave of Gallium (Ⅲ-Lumogallion

作　　者：李南强[1] 贺维军[1] 

机构地区：[1]北京大学化学系,北京100871

出　　处：《高等学校化学学报》1993年第11期1531-1533,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金

摘　　要：在荧光法中用荧光镓（LMG）测定镓已有报道,但有关的电分析研究和应用尚未见报道。我们在研究LMG伏安行为和稀土-LMG极谱络合吸附波的基础上,于一氯乙酸缓冲底液中得到了高选择性和高灵敏度的Ga（Ⅲ）-LMG的络合吸附波,检出限为 8.0×10^-9mol/L,可不经分离在酸性溶液中直接测定以SiO₂和Al₂O₃为基体的催化剂中的镓,并研究了反应过程机理。In ClCH2COOH-ClCH2COONa buffer solution at pH 2. 8, a sensitive adsorptive complex wave of Ga( Ⅲ )-lumogallion(LMG) was obtained by single-sweep polarography. The detection limit is down to 8. 0× 10-9 mol/L. The proposed method has been applied to the determination of gallium content in catalyst. The composition of the complex was detected as Ga( Ⅲ ) : LMG = 1 : 1. The rate constant of the surface electrochemical reaction was determined as k8= 0. 56 s-1.

关 键 词：镓 荧光镓 单扫极谱法 

分 类 号：O614.371[理学—无机化学]