Tian J, Yin Y
Department of Chemistry, 4F TH-UNIS Building II, Tsinghua University, Beijing 100084, P.R. China.
Amino Acids. 2004 Mar;26(2):175-81. doi: 10.1007/s00726-003-0039-3. Epub 2003 Nov 20.
13C NMR integral areas and spin-lattice relaxation times (T1's) of a series of amino acids were determined at different concentrations. It was found that the spin-lattice relaxation times were markedly reduced in 3 M magnesium chloride resulting in the integral area being proportional to the number of carbon atoms producing each particular signal, with a reliability in excess of 95%. Magnesium chloride is proposed as a 13C NMR relaxation agent for amino acids.
在不同浓度下测定了一系列氨基酸的13C核磁共振积分面积和自旋晶格弛豫时间（T1）。结果发现，在3M氯化镁中自旋晶格弛豫时间显著缩短，使得积分面积与产生每个特定信号的碳原子数成正比，可靠性超过95%。提出将氯化镁用作氨基酸的13C核磁共振弛豫剂。
