Hydrodynamic chromatography of waxy maize starch
A hydrodynamic column packed with solid beads chemically bonded with N-methyl-D-glucamine residues was used with 90% dimethylsulfoxide (DMSO)-H2O mobile phase as part of a chromatographic system to characterize jet-cooked waxy maize starch. Software calculations based on signals from refractive inde...
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Published in | Cereal chemistry Vol. 74; no. 6 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
01.11.1997
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Subjects | |
Online Access | Get more information |
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Summary: | A hydrodynamic column packed with solid beads chemically bonded with N-methyl-D-glucamine residues was used with 90% dimethylsulfoxide (DMSO)-H2O mobile phase as part of a chromatographic system to characterize jet-cooked waxy maize starch. Software calculations based on signals from refractive index and dual-angle light-scattering detectors indicated the column could fractionate molecular weights up to approximately 5 X 10(8). Calculated molecular weight values for the highest molecular weight sample was greatest at the lowest flow rate of 0.1 mL/min. Values of molecular weights and radii of gyration determined by the in-line dual-angle light-scattering detector were significantly less than those determined with an off-line multiangle light-scattering detector that examined samples that had not traveled through the hydrodynamic column. This work has demonstrated the feasibility of using a hydrodynamic column to characterize waxy maize amylopectins. However, considerations of sample shear sensitivity and questions of in-line light scattering detection show that further efforts are required to develop and optimize a chromatographic system to characterize very high molecular weight amylopectins |
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Bibliography: | Q04 1997073404 |
ISSN: | 0009-0352 1943-3638 |
DOI: | 10.1094/CCHEM.1997.74.6.832 |