有色金属科学与工程2017，Vol.8Issue(6)：1-6,6.DOI:10.13264/j.cnki.ysjskx.2017.06.001
CP熔盐电化学方法检测LiCl-KCl 熔盐La(Ⅲ)浓度
Determination of La (Ⅲ) in LiCl-KCl eutectic by CP electrochemical method
摘要
Abstract
The lanthanum ions in the LiCl-KCl eutectic with 0.98 %, 2.0 % and 3.3 % LaCl3 were tested by CP electrochemical method in the 773 K argon atmosphere. The results show that the reduction potential of La (Ⅲ) on the tungsten electrode relative to the silver/silver chloride reference electrode was about -2.0~-2.2 V. By calculating the relationship among the value of the cathode peak current, transition time and immersion depth in the CP results, the diffusion coefficient was measured to be 1.29×10-5~5.42×10-5 cm2/s at 773 K. The relative errors compared Chronoamperometry (CP) and Inductive Coupled Plasma Emission Spectrometer (ICP) of La ion concentration determination is 1.25 %, 1.11 % and 1.72 % respectively. In LiCl-KCl eutectic, the peak root current and transition time square root product of La electrodeposition show a good linear relationship with the concentration. It is feasible to apply the CP electrochemistry techniques directly to determination the ion concentration.关键词
熔盐电化学/镧/离子浓度检测/计时电位法/LiCl-KCl熔盐Key words
eutectic electrochemisty/lanthanum/ion concentration detection/chronoamperometry/LiCl-KCleutectic分类
矿业与冶金引用本文复制引用
李林山,杨少华,赵宇娟,王昭文..CP熔盐电化学方法检测LiCl-KCl 熔盐La(Ⅲ)浓度[J].有色金属科学与工程,2017,8(6):1-6,6.基金项目
国家自然科学基金资助项目(51164013 （）
51664022) （）
