摘要
在0.15mol/L氯化吡啶—吡啶溶液中,铊在汞膜电极上出现清晰的半微分阳极溶出峰,峰电流易准确测量.对该底液中电极反应机理探讨实验说明,上述体系铊具有吸附特性.检测下限可达20ppt.方法干扰少,且易消除,岩矿中铊的测定不必预先分离、富集,测定结果满意.
A new adsorptive-complex system of thallium has been suggested. In a 0.15 mol/L pyridine hydrochlqride-pyridine by using semidifferential voltammetry the complex of T1 with pyridine hy-drochloride-pyridine produces a sharp sensitive stripping peak on the mercury film electrode. The behavidur of the adso'rptive wave has been studied. It has been shown that system has adsorptive characteristic. The detection limit of Tl is 20 ppt. The effects off other ions are less. The interference is eliminated by 0.01 mol/L EDTA. Trace Tl in ores can be analyzed directly without needing separation and Accumulation.
出处
《冶金分析》
CAS
CSCD
北大核心
1991年第4期3-6,共4页
Metallurgical Analysis
