高等学校化学学报

高等学校化学学报 ›› 1987, Vol. 8 ›› Issue (10): 876.

• 研究简报 • 上一篇    下一篇

铈(Ⅲ)-三乙四胺六乙酸的配合物及其应用于铈的导数分光光度测定

徐钟隽, 潘教麦   

  1. 华东师范大学化学系
  • 收稿日期:1986-05-15 出版日期:1987-10-24 发布日期:1987-10-24
  • 基金资助:

    中国科学院科学基金

Cerium(Ⅲ)-Triethylenetetraminehexaacetic Acid (TTHA)Complex and Its Application to the Derivative Spectrophotometric Determination of Cerium in Mixture of Rare Earth Oxides

Xu Zhongjun(Hsu Chung-gin), Pan Jiaomai   

  1. Department of Chemistry, East China Normal University, Shanghai
  • Received:1986-05-15 Online:1987-10-24 Published:1987-10-24

PDF (PC)

被引次数

3

摘要： 多氨基多羧酸可与稀土离子生成稳定的配合物,EDTA、二乙三胺五乙酸(DTPA)和四乙五胺七乙酸(TPHA)曾用于测定某些单一稀土,但铈(Ⅲ)的测定尚未见报道.本文研究了三乙四胺六乙酸(TTHA)与铈(Ⅲ)的配合物在紫外区的吸收光谱,用导数分光光度法选择测定了混合稀土氧化物中铈的含量。

Abstract: TTHAformed a 1:1 complex with cerium (Ⅲ ) at pH5.5 that showed an absorption maximum at 279 nm with a molar absorptivity of 8.18×102l·mol·cm-1. Most of the rare earths and scandium in 10-fold amounts do not interfere. The second-derivative spectrum recorded from 320 to 240nm can be used to determine 5-80ppm of cerium. The method was applied to the determination of cerium in the mixtures of rare earth oxides with satisfactory results.

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