Determination of the degree of substitution of acetylated starch by hydrolysis, 1H NMR and TGA/IR

被引：204

作者：

Elomaa, M

Asplund, T

Soininen, P

Laatikainen, R

Peltonen, S

Hyvärinen, S

Urtti, A

机构：

[1] Univ Kuopio, Dept Pharmaceut, Laakekehitys, FIN-70211 Kuopio, Finland

[2] Raisio Chem, Analyt Lab, FIN-21201 Raisio, Finland

[3] Univ Kuopio, Dept Chem, FIN-70211 Kuopio, Finland

[4] VTT, Proc, FIN-05201 Rajamaki, Finland

来源：

CARBOHYDRATE POLYMERS | 2004年 / 57卷 / 03期

关键词：

acetylated starch; degree of substitution; TGA/IR; NMR;

D O I：

10.1016/j.carbpol.2004.05.003

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The suitability of TGA/IR method for the analysis of the degree of substitution (DS) of acetylated starch (SA) was assessed. Ten standard samples were analysed for their DS by hydrolysis method and, those of the standards which could be properly dissolved, also by H-1 NMR. NMR analysis shows as well that the standards had other structural differences than DS. By TGA using derivatives of thermograms (DTG) it was possible to predict the DS with percentual coefficient of determination of 98. Somewhat more accurate results (R2 = 98.7) were received when the evolving acetic acid was analysed by IR. The result is very good because it is at the same precision level as the results of the hydrolysis and H-1 NMR methods. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：261 / 267

页数：7

共 15 条

[1] Influence of the nature and treatment of starch on aroma retention [J].