Determination of the substitution patterns of cellulose methyl ethers by HPLC and GLC-comparison of methods
Determination of the substitution patterns of cellulose methyl ethers by HPLC and GLC-comparison of methods
复制标题
通过 HPLC 和 GLC 测定纤维素甲基醚的取代模式 - 方法比较
DOI:
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发表时间:
1992
期刊:
影响因子:
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通讯作者:
D. Klemm
中科院分区:
文献类型:
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作者:
U. Erler;P. Mischnick;A. Stein;D. Klemm
SummaryThe substitution patterns of methyl cellulose as well as of a thexyldimethylsilyl cellulose after permethylation were determined by hydrolysis and separation of the resulting partially methylated glucoses without further derivatization by h.p.l.c.. On an amine-modified silica column the solutes get separated into glucose, 2,3,6-tri-O-methyl glucose and the groups of mono-O-methyl-and di-O-methyl glucoses. A chromatographic run on a reversed-phase column enables the identification of the single mono-O-methyl- and di-O-methyl glucoses. In this way, a determination of both the average degree of substitution and the substitution pattern of cellulose derivatives is possible. Comparison of the results with those obtained by standard methylation analysis including g.l.c.-m.s. proves the correctnes of the method employed.
影响因子:
3.1
作者:
D'Ambra,AJ;Rice,MJ;Zeller,SG;Gruber,PR;Gray,GR
通讯作者:
Gray,GR