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United States Department of Agriculture

Agricultural Research Service

Research Project: NUTRIENT CYCLING AND UTILIZATION ON ORGANIC DAIRY FARMS

Location: New England Plant, Soil and Water Research Laboratory

Title: Distinction of Metal Species of Phytate by Solid State Spectroscopic Techniques

Authors
item HE, ZHONGQI
item Honeycutt, Charles
item Zhang, T - AGRIC&AGRI-FOOD CANADA
item Pellachia, P - UNIV OF SOUTH CAROLINA
item Caliebe, W - BROOKHAVEN NATL LAB, NY

Submitted to: Soil Science Society of America Journal
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: January 22, 2007
Publication Date: May 15, 2007
Citation: He, Z., Honeycutt, C.W., Zhang, T., Pellachia, P.J., Caliebe, W.A. 2007. Distinction of Metal Species of Phytate by Solid State Spectroscopic Techniques. Soil Science Society of America Journal. 71:940-943

Interpretive Summary: Phytate (inositol hexaphosphoric acid) has been found as a predominant form of organic phosphorus in animal manure, soil, and other environments as 51 million tons of phytate are formed in crops and fruits each year globally. However, the interactions and fate of phytate in the environment remain poorly understood. We evaluated advanced spectroscopic techniques for their ability to distinguish different metal phytate compounds. Significant differences were observed in the shape and position of spectra among the metal phytates. This work demonstrated that the advanced spectroscopic technologies could be used to facilitate research on the interaction and fate of phytate in the environment.

Technical Abstract: Each year 51 million tons of phytate (inositol hexaphosphoric acid) are formed in crops and fruits globally. Thus, phytate is a predominant form of organic phosphorus in animal manure, soil, and other organic substances. However, the interactions and fate of phytate in the environment remain poorly understood. Whereas solid state 31P nuclear magnetic resonance (NMR) and X-ray absorption near edge structure (XANES) spectroscopic techniques have provided knowledge on metal speciation of inorganic phosphorus, no effort has been made to accurately assign speciated metal phytates. To evaluate the feasibility of metal speciation of phytates by solid state 31P NMR and XANES spectroscopic techniques, we determined and analyzed the solid state spectral characteristics of six metal phytates. Significant differences were observed in the shape and position of spectra among the metal phytates. This work demonstrated that the advanced spectroscopic technologies evaluated could be used to advance our knowledge of the fate of phytate, particularly as it interacts with metal species in the environment.

Last Modified: 8/19/2014
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