EFFECT OF CROSS-LINKING ON PHYSICOCHEMICAL AND IN VITRO DIGESTIBILITY PROPERTIES OF POTATO STARCH

Emirates Journal of Food and Agriculture

Hyemi Heo¹  Yoon Hyuk Chang¹  Yun-Kyung Lee¹ 

[1] Department of Food and Nutrition, Kyung Hee University, Seoul 02447, Korea

关键词: Cross-linking;    In vitro digestibility;    Potato starch;    Sodium trimetaphosphate;    Sodium tripolyphosphate;   

DOI  :  10.9755/ejfa.2017-01-237

学科分类：农业科学（综合）

来源: United Arab Emirates University, Faculty of Food and Agriculture

【 摘 要 】

The present study aimed to investigate the physicochemical and in vitro digestibility properties of potato starch cross-linked using sodium trimetaphosphate (STMP)/ sodium tripolyphosphate (STPP). These properties were investigated by X-ray diffraction, analysis of the swelling factor and light transmittance, and in vitro digestibility tests for rapid digestible starch (RDS) and resistant starch (RS) contents. X-ray diffraction patterns showed that cross-linking with STMP/STPP occurred primarily in the amorphous regions and did not change the crystalline region of the potato starch granules. The swelling factor and light transmittance of the cross-linked potato starch (CLPS) was significantly lower than that of the native potato starch (NPS). The in vitro digestibility results showed that cross-linking with STMP/STPP decreased the RDS contents significantly and increased the RS contents significantly compared with those of NPS. The RS contents of potato starch increased significantly with the increasing degree of crosslinking. Potato starch cross-linked using STMP/STPP can be used a source of dietary fiber in the food industry.

【 授权许可】

CC BY