摘要
在ｐＨ５．７０的０．０１４ｍｏｌ／ＬＨＡｃ－０．１０ｍｏｌ／Ｌ ＮａＡｃ－０．１２ｍｏｌ／ＬＫＣｌ－２．０×１０－５ｍｏｌ／Ｌ二溴茜素紫溶液中，用单扫示波极谱法获得了镓（Ⅲ）与二溴茜素紫络合物吸附波，峰电位为－１．１２Ｖ（ｖｓ．ＳＣＥ），峰电流与ＣＧａ（Ⅲ）在２．９×１０－７～１．０×１０－５ｍｏｌ／Ｌ范围内呈良好的线性关系．作者研究了该电极反应机理．本法已用于矿石和金属材料中镓的测定，结果满意．
A sensitive adsorptive wave of gallium (Ⅲ) -dibromoalizarin violet complex was observed in 0.014mol/L aceticacid-0.10mol/L sodium acetate buffer solution (pH5.70) containing 0.12mol/L KCl and 2.0×10-5 mol/L dibromoalizarin vio let by single-sweep polaroglaphy. The peak potential is at -1.12V(vs.SCE). The height of second derivative wave is linearlyrelated to the concentration of gallium (Ⅲ) in the range of 2.9×10-7 -1.0×10-5 mol/L. The mechanism of the electrode reaction was discussed in detail. The wave was confirmed to be the adsorptive complex wave. The method has been appliedwell for determination of gallium in ons and metallic meterials after separation by solvent extraction.
出处
《冶金分析》
CAS
CSCD
北大核心
1999年第3期8-10,4,共4页
Metallurgical Analysis
关键词
镓
二溴茜素紫
络合物吸附波
单扫示波极谱法
Gallium, Polarographic adsorptive complex wave, Dibromoalizarin violet, Single-sweep polarography
