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Distinction of Metal Species of Phytate by Solid-State Spectroscopic Techniques

^a USDA-ARS, New England Plant, Soil and Water Lab., Orono, ME 04469
^b Agriculture & Agri-Food Canada, Greenhouse & Processing Crops Research Ctr., Harrow, ON, N0R 1G0, Canada
^c Dep. of Chemistry and Biochemistry, Univ. of South Carolina, Columbia, SC 29208
^d National Synchrotron Light Source, Brookhaven National Lab., Upton, NY 11973

View larger version (15K): [in this window] [in a new window]   Fig. 1. Solid-state 31P spectra of metal inorganic phosphates. The values following the compound names are isotropic chemical shifts (in ppm).

View larger version (19K): [in this window] [in a new window]   Fig. 2. Solid-state 31P spectra of metal phytates (IP6). The values following the compound names are isotropic chemical shifts (in ppm). The symmetric minor peaks are spinning side bands.

View larger version (23K): [in this window] [in a new window]   Fig. 3. Phosphorus K-edge XANES spectra of metal phytate compounds. The values following the compound names are the edge shift (in eV) relative to the nominal P-K-edge at 2145.5 eV: (A) data were collected with total electron yield mode; (B) data were collected with total fluorescence yield mode.