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NMR oxygen-17 studies of water dynamics in heterogeneous gel and particulate systems

✍ Scribed by B.P. Hills; C.E. Manning

Publisher: Elsevier Science
Year: 1998
Tongue: English
Weight: 784 KB
Volume: 75
Category: Article
ISSN: 0167-7322
DOI: 10.1016/s0167-7322(97)00022-6

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✦ Synopsis

Beginning with a thermodynamic description of the state of water in heterogeneous "microosmotic" systems, a multistate theory of water activity is presented together with theoretical relationships between NMR water relaxation times, water activity and electrical conductivity. These relationships are tested using measurements of NMR water oxygen-17 relaxation rates in a variety of simple model systems. Although the results support the multistate theory, other descriptions of the state of water in micro-osmotic systems cannot be excluded and some of these alternatives are discussed.

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