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Citation: DAI Xiao-Min, ZUO Xiu-Jin, LIU Xiu-Dong, XIE Wei-Yang, MA Xiao-Jun. Determination of High Substitution Degree of Starch Acetate[J]. Chinese Journal of Applied Chemistry, ;2003, 20(7): 687-689. shu

Determination of High Substitution Degree of Starch Acetate

1.
a Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023;
2.
b Dalian University, Dalian

Corresponding author: MA Xiao-Jun,
Received Date: 28 October 2002
Available Online: 14 April 2003
Fund Project: 国家自然科学基金资助项目(20176056) (20176056)中国科学院知识创新工程重大项目(KZCX1-SW-19) (KZCX1-SW-19)

The acid-alkali titration method of determination of degree of substitution(DS) for starch acetates has been improved by using acetone as solvent instead of ethanol. The saponification time could be reduced from 48 h or 72 h(using ethanol as solvent) to 1 h with acetone as solvent, and the RSD also decreased. The method has advantages of rapidity and high accuracy.
- starch acetate,
- substitution degree,
- acid-alkali titration
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