期刊
CARBOHYDRATE POLYMERS
卷 98, 期 2, 页码 1430-1437出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2013.07.061
关键词
Cellulose acetate; Degree of substitution; Molar mass; Gradient high performance liquid chromatography; Size exclusion chromatography; Two-dimensional liquid chromatography
资金
- Deutscher Akademischer Austauschdienst (DAAD)
A two-dimensional liquid chromatographic method (2D LC) was developed to analyze the heterogeneities of cellulose acetates (CA) in the DS-range DS = 1.5-2.9 with respect to both, molar mass and degree of substitution (DS). The method uses gradient liquid chromatography (HPLC) as the first dimension in order to separate by DS followed by separation of the different fractions by size (SEC) in the second dimension. The 2D experiments revealed different correlations between gradient and SEC elution volume. These correlations might arise from differences in the synthetic conditions. The newly developed 2D LC separation therefore provides new insights into the heterogeneity of CAs. (C) 2013 Elsevier Ltd. All rights reserved.
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