基于固体核磁共振多次交叉极化的定量检测优化技术

董洪春,张志兰,王宁,唐丹丹,裘子慧,舒婕

The Improved Solid-state NMR Quantitative Method on the Bases of Multiple-cross Polarization Technique

DONG Hongchun,ZHANG Zhilan,WANG Ning,TANG Dandan,QIU Zihui,SHU Jie

表1 L-丙氨酸和L-缬氨酸分子中各基团在ramp-CP和LGCP条件下的T_CH和

T_{1 ρ}^{H}

值

Table 1 T_CH and

T_{1 ρ}^{H}

values of L-alanine and L-valine measured under ramp-CP and LGCP conditions

Sample	Carbons	T_1,H/ms	ramp-CP		LGCP
Sample	Carbons	T_1,H/ms	T_CH/ms	$T_{1 ρ}^{H}$ /ms	T_CH/ms	$T_{1 ρ}^{H}$ /ms
L-alanine	1	977.1	0.170	1.7	0.387	12.8
	2		0.042		0.174
	3		0.360		0.331
L-valine	4	718.5	0.174	2.5	0.414	24.3
	5		0.036		0.157
	6		0.033		0.120
	7		0.290		0.240
	8		0.154		0.374