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13C CP/MAS NMR光谱法分析烟草果胶的含量和结构
烟草 果胶 NMR光谱 结构分析
2015/6/18
采用CP/MAS 13C NMR光谱法分析烟草果胶的含量和结构。对烟草果胶进行了优化提取后, 再对其13C NMR光谱图C-6吸收峰区域进行了详细研究, 用于计算果胶中半乳糖醛酸(GalA)、甲酯度(DM) 和乙酰度(DA) 的含量, 并就建立的定量方法与经典的色谱法和重量法进行了比较。结果表明, CP/MAS 13C NMR光谱法测定烟草样品中果胶的含量是可靠的, 化学位移和峰面积可用来计算烟草...
13C CP/MAS NMR spectra of pectins: a peak-fitting analysis in the C-6 region
13C CP/MAS NMR pectins peak fitting degrees of methylation (DM) degrees of acetylation (DAc)
2014/3/19
13C CP/MAS NMR spectra of pectin samples were measured and interpreted. The influence of methylesterification and O-acetylation on chemical shifts of pectin carbons was studied using model pectate, pe...
13C CP/MAS NMR spectra of pectins: a peak-fitting analysis in the C-6 region
13C CP/MAS NMR pectins peak fitting degrees of methylation (DM) degrees of acetylation (DAc)
2014/3/19
13C CP/MAS NMR spectra of pectin samples were measured and interpreted. The influence of methylesterification and O-acetylation on chemical shifts of pectin carbons was studied using model pectate, pe...
13C CP/MAS NMR spectra of pectins: a peak-fitting analysis in the C-6 region
13C CP/MAS NMR pectins peak fitting degrees of methylation (DM) degrees of acetylation (DAc)
2014/3/19
13C CP/MAS NMR spectra of pectin samples were measured and interpreted. The influence of methylesterification and O-acetylation on chemical shifts of pectin carbons was studied using model pectate, pe...