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Volume 8 Issue 6
Dec.  2017
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LI Linshan, YANG Shaohua, ZHAO Yujuan, WANG Zhaowen. Determination of La (Ⅲ) in LiCl-KCl eutectic by CP electrochemical method[J]. Nonferrous Metals Science and Engineering, 2017, 8(6): 1-6. DOI: 10.13264/j.cnki.ysjskx.2017.06.001
Citation: LI Linshan, YANG Shaohua, ZHAO Yujuan, WANG Zhaowen. Determination of La (Ⅲ) in LiCl-KCl eutectic by CP electrochemical method[J]. Nonferrous Metals Science and Engineering, 2017, 8(6): 1-6. DOI: 10.13264/j.cnki.ysjskx.2017.06.001
shu

Determination of La (Ⅲ) in LiCl-KCl eutectic by CP electrochemical method

  • School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, china

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  • Received Date: July 31, 2017
  • Published Date: December 30, 2017
    Graphical Abstract
    • 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 between the value of the cathode peak current, transition time and the 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.
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    • References (19)
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