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Mobility of Water in Starch‐Sucrose Systems Determined by Deuterium and Oxygen‐17 NMR
Author(s) -
Richardson S. J.,
Baianu I. C.,
Steinberg M. P.
Publication year - 1987
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.19870390904
Subject(s) - starch , sucrose , chemistry , deuterium , oxygen , nuclear magnetic resonance spectroscopy , oxygen 17 , relaxation (psychology) , aqueous solution , analytical chemistry (journal) , nuclear chemistry , chromatography , nuclear magnetic resonance , organic chemistry , physics , psychology , social psychology , quantum mechanics
The molecular mobility of water in a starch‐sucrose system was determined by deuterium ( 2 H) and oxygen‐17 ( 17 O) high‐field Nuclear Magnetic Resonance (NMR) spectroscopy. The starch‐sucrose system was composed of freeze‐dried starch:sucrose (FSS) (90:10) in deuterium oxide or enriched oxygen‐17 water over the solids concentration range of 10 to 93% solids. The NMR transverse relaxation rate (R 2 ) and peak behavior were analyzed in terms of solids concentration and water activity. R 2 of the FSS system is compared to the R 2 of starch and sucrose systems alone. The relaxation behavior of the 2 H and 17 O were compared for FSS, starch and sucrose. The results led to the conclusion that the best NMR methodology for the investigation of water mobility is provided by 17 O NMR.