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Investigation of Starch Hydration by 2D Time Domain NMR

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Witek M., Peemoeller H., Szymońska J., Blicharska B.
Acta Physica Polonica A
|
2006
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vol. 109
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issue 3
359-364
EN
Proton exchange between spin groups of the solid matrix of hydrated granular potato starch and water was studied using the 2D time domain NMR. The proton spin-spin relaxation time T_2, and spin-lattice relaxation time T_1 (selective and non-selective pulse sequences) were measured at room temperature. The observed spin relaxation results were analysed for exchange assuming a two-site exchange model (between water and solid matrix of starch). In this analysis we determined the intrinsic spin-lattice relaxation time for water protons (49 ms) and solid starch matrix protons (172 ms), as well as the water-starch magnetization exchange rate (86 s^{-1}).
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