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31P and 23Na NMR studies of the structure and lability of the sodium shift reagent, bis(tripolyphosphate)dysprosium(iii) ([dy(p3O10)]7−) ion, and its decomposition in the presence of rat muscle

The 31P NMR of aqueous [Dy(P3O10)2]7− demonstrates that it is in slow exchange with P3O  105− on the NMR time scale. In the presence of tissue, [Dy(P3O10)2]7− decomposes to PO4 with an accompanying slow change of the tissue 23Na NMR of extracellular Na+ ion in several NMR distinguishable extracellular sites. © 1986 Academic Press, Inc.