A new NMR method for directly monitoring and quantifying the dissolution kinetics of starch in DMSO

Dona, A., yuen, C-W. W., Peate, J., Gilbert, R. G., Castignolles, P. and Gaborieau, M. (2007) A new NMR method for directly monitoring and quantifying the dissolution kinetics of starch in DMSO. Carbohydrate Research, 342 17: 2604-2610. doi:10.1016/j.carres.2007.08.010


Author Dona, A.
yuen, C-W. W.
Peate, J.
Gilbert, R. G.
Castignolles, P.
Gaborieau, M.
Title A new NMR method for directly monitoring and quantifying the dissolution kinetics of starch in DMSO
Journal name Carbohydrate Research   Check publisher's open access policy
ISSN 0008-6215
Publication date 2007-12-10
Year available 2007
Sub-type Article (original research)
DOI 10.1016/j.carres.2007.08.010
Volume 342
Issue 17
Start page 2604
End page 2610
Total pages 7
Place of publication London
Publisher Elsevier
Collection year 2008
Language eng
Subject 250599 Macromolecular Chemistry not elsewhere classified
670702 Synthetic resins and rubber
C1
Abstract The kinetics of dissolution of starch is needed for (i) understanding digestive processes; (ii) providing data that could correlate with higher levels of starch structure; (iii) improving techniques for starch characterization in solution. A novel method is presented here to directly monitor these dissolution kinetics by time-resolved 1H solution-state nuclear magnetic resonance (NMR); studies were carried out in deuterated dimethyl sulfoxide (DMSO-d6). By assuming pseudo-first-order kinetics with respect to starch concentration, the data for various starch samples yield values of the apparent rate coefficients for the rate of appearance of completely dissolved anhydroglucose units, results which have not been obtained hitherto. The presence of a limited amount of water in DMSO had a drastic effect on dissolution kinetics (slowing it down at high temperatures), indicating multiple pathways for the dissolution mechanism. Dynamic light scattering (DLS) appears to be more limited than the NMR method to monitor the kinetics of dissolution. The newly developed NMR method can be extended to other solvents and polysaccharides.
Q-Index Code C1
Q-Index Status Confirmed Code
Additional Notes Available online 24 August 2007

 
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Created: Fri, 28 Mar 2008, 11:57:52 EST by Kaye Hunt on behalf of School of Land, Crop and Food Sciences