Assessment of the Extent of Starch Dissolution in Dimethyl Sulfoxide by  1 H NMR Spectroscopy | Zendy

Schmitz Sarah | Zendy; Dona Anthony C. | Zendy; Castignolles Patrice | Zendy; Gilbert Robert G. | Zendy; Gaborieau Marianne | Zendy

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Assessment of the Extent of Starch Dissolution in Dimethyl Sulfoxide by 1 H NMR Spectroscopy

Author(s) -

Schmitz Sarah,

Dona Anthony C.,

Castignolles Patrice,

Gilbert Robert G.,

Gaborieau Marianne

Publication year - 2009

Publication title -

macromolecular bioscience

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.924

H-Index - 105

eISSN - 1616-5195

pISSN - 1616-5187

DOI - 10.1002/mabi.200800244

Subject(s) - dissolution , starch , amylose , chemistry , dimethyl sulfoxide , nuclear magnetic resonance spectroscopy , aqueous solution , maize starch , nuclear chemistry , chromatography , solubility , organic chemistry

Complete dissolution is needed for the separation, characterization, or homogeneous labeling of whole starch molecules. A method is presented to quantify the extent of starch dissolution in DMSO for the first time; it is validated on a commercial rice starch. It is used directly on starch dispersions containing possible undissolved or co‐dissolved species. High‐amylose maize starches, known to be digested slowly in vivo , only quantitatively dissolve in the presence of high concentrations of an H‐bond disrupter, LiBr, although they form clear dispersions at low LiBr concentrations. Starch quantitatively dissolves from waxy rice flours; non‐starch components partially co‐dissolve but do not interfere with the dissolution quantification.

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