Abstract
The molecular structure of corn starches different in amylose content (waxy, normal, and high-amylose) was analyzed in 90% dimethyl sulfoxide (DMSO) solution by refractive index (RI) and multi-angle laser light scattering (MALLS) detectors. The starch sample solutions were measured either by medium-pressure size exclusion chromatography (MPSEC) or by the micro-batch mode. For waxy corn starch, the average molar mass (Mw) and radius of gyration (R g) values were similar in both methods. However, for normal and high-amylose corn starches, Mw measured by the micro-batch mode was 2-4 times greater than that by the chromatographic method, although R g values obtained from both methods were not very different. The Mw difference was the greater the higher the amylose content of starch.
Original language | English |
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Pages (from-to) | 262-267 |
Number of pages | 6 |
Journal | Starch/Staerke |
Volume | 57 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2005 Jun |
Keywords
- Average molar mass
- Corn starch
- DMSO
- Radius of gyration
ASJC Scopus subject areas
- Food Science
- Organic Chemistry