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~1H NMR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~1H NMR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。
The rare earth in its mixture has been determined by ~1H and ^(13)C NMR in its aqueous halide solution. For samples containing only light lanthanides,both ~1H and ^(13)C 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. ^(13)C 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.
出处
《应用化学》
CAS
CSCD
北大核心
1993年第3期72-74,共3页
Chinese Journal of Applied Chemistry
基金
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
关键词
氨三乙酸
稀土配合物
NMR
rare earth, nitrilotriacetate, complex, determination, NMR
