期刊
FOOD CHEMISTRY
卷 197, 期 -, 页码 872-880出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2015.10.120
关键词
Starch hydrolysis products; Corn syrup solids; Maltooligosaccharides; Maltopolysaccharides; Ethanol-fractionation; Dispersity
资金
- USDA National Institute of Food and Agriculture [2014-31100-06041]
Considerable research is focused on understanding the functionality of starch hydrolysis products (SHP) consisting of glucose, maltose, maltooligosaccharides (MOS), and maltopolysaccharides (MPS). A confounding factor in this research is the high molecular dispersity of commercially available SHP. The study presented herein characterizes a flexible fractionation approach for lowering the dispersity of such products. This was accomplished by fractionating a corn syrup solids (CSS) preparation based on the differential solubility of its component saccharides in aqueous-ethanol solutions. Products obtained from selected fractionations were characterized with respect to degree of polymerization (DP; liquid chromatography), dextrose equivalency (reducing sugar assays), and prevalence of branching (NMR). Glucose and maltose were preferentially removed from CSS using high (P90%) ethanol extractants. Preparations with relatively narrow ranges of MOS, lower DP MPS, and higher DP MPS were obtained through repetitive 70%-ethanol extractions. Linear, as opposed to branched, MOS and MPS were preferentially extracted under all conditions tested. (C) 2015 Elsevier Ltd. All rights reserved.
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