中华医学超声杂志

应用化学 ›› 1993, Vol. 0 ›› Issue (3): 72-74.

• 研究简报 • 上一篇    下一篇

混合物中稀土元素的NMR法测定

任吉民, 景凤英, 张善荣, 裴奉奎, 王文韵   

  1. 中国科学院长春应用化学研究所 130022 长春
  • 收稿日期:1992-04-09 修回日期:1992-06-17 出版日期:1993-06-10 发布日期:1993-06-10
  • 基金资助:
    国家自然科学基金;中国科学院稀土物理和化学开放实验室基金资助

DETERMINATION OF RARE EARTH IN THE MIXTURE BY NMR

Ren Jimin, Jing Fengying, Zhang Shanrong, Pei Fengkui, Wang Wenyun   

  1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022 Changchun
  • Received:1992-04-09 Revised:1992-06-17 Published:1993-06-10 Online:1993-06-10

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摘要： 核磁共振检测混合物中的共存金属是新近发展起来的无机分析方法。Fedorov以EDTA和NTA为配体,通过观察络合物Ln(EDTA)和Ln(NTA)2配体的1HNMR谱线,率先开展了水溶液中共存稀土元素的同时间接测定研究,这种方法比分别直接检测各稀土核磁核共振信号的方法实用可靠,且方便易行。但采用1HNMR谱检测水溶液中顺磁稀土离子时,强的溶剂水峰易掩蔽近邻的稀土配合物谱线;某些重稀土配合物的1H谱线宽,相互重叠,难以用作分辨稀土元素.本文讨论和比较了Ln(NTA)2的1H,13CNMR谱在检测稀土元素中的优劣.

关键词: 氨三乙酸(NTA), 稀土配合物, 核磁共振法测定

Abstract: The rare earth in its mixture has been determined by 1H and 13C NMR in its aqueous halide solution. For samples containing only light lanthanides,both 1H and 13C spectrometry can be used for quantitative determination of individual rare earth in the mixture. For samples containing heavy lanthanides, 1H spectraometry is unsuitable for accurate determination due to the serious broadening and overlapping of the signals in the spectra and interference from water. 13C spectrometry,however,can be used successfully since each complex of Ln (NTA)2 in the mixture has at least a unique well-re-solved peak.

Key words: rare earth, nitrilotriacetate, complex, determination, NMR

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