摘要
将一些新近发展起来的１ＨＮＭＲ技术用于溶在不同溶剂（Ｄ２Ｏ，ＮａＯＨ／Ｄ２Ｏ及ＤＭＳＯｄ６）中的腐殖酸样品的研究，这包括全相关谱方法（ＴＯＣＳＹ），扩散谱方法和最大量子谱方法（ＭＡＸＹ）．ＤＭＳＯ溶液的ＴＯＣＳＹ谱中４与８之间的相关峰表明在腐殖酸中可能包含有不溶于水的多肽，扩散谱指出在碱性条件下，一些小分子脱离了腐殖酸聚合体，而ＭＡＸＹ谱编辑方法则使得一些细致的归属成为可能．
Some newly developed one and two dimensional 1H NMR techniques, including totally correlated spectroscopy (TOCSY), self diffusion coefficient measurements and maximum quantum spectroscopy (MAXY), are applied to the study of a humic acid sample suspended or dissolved in D 2O, NaOH/D 2O and DMSO d 6. TOCSY experiments suggest that humic acids contain polypeptides that are soluble in DMSO but not in water, while the self diffusion coefficient measurements suggest that in basic solution there are small molecules that are not included in the humic acid aggregates. From the MAXY spectra, detailed assignments for the proton resonances become possible.
出处
《波谱学杂志》
CAS
CSCD
北大核心
1998年第5期411-420,共10页
Chinese Journal of Magnetic Resonance
基金
国家自然科学基金
关键词
腐殖酸
NMR
自扩散测量
MAXY谱编辑
Humic acids, 1H NMR, TOCSY, Self diffusion measurement, MAXY spectral editing
