Abstract
Information concerning the chemical state of trace elements in biological systems generally has not been available. Such information for toxic elements and metals in metalloproteins could prove extremely valuable in the elucidation of their metabolism and other biological processes. The shielding of core electrons by binding electrons affect the energy required for creating inner-shell holes. Furthermore, the molecular binding and symmetry of the local environment of an atom affect the absorption spectrum in the neighborhood of the absorption edge. X-ray absorption near-edge structure (XANES) using synchrotron radiation excitation can be used to provide chemical speciation information for trace elements at concentrations as low as 10 ppm. The structure and position of the absorption curve in the region of an edge can yield vital data about the local structure and oxidation state of the trace element in question. Data are most easily interpreted by comparing the observed edge structure and position with those of model compounds of the element covering the entire range of possible oxidation states. Examples of such analyses will be reviewed.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
A. Bianconi, M. Dell'Ariccia, P. J. Durham, and J. B. Pendry,Phys. Rev. B26, 6502 (1982).
G. S. Brown and S. Doniach, inSynchrotron Radiation Research, H. Winick and S. Doniach, eds., Plenum, New York, NY, 1980, p. 353.
J. B. Hastings, P. Eisenberger, B. Lengeler, and M. L. Perlman,Phys. Rev. Lett. 43, 1807 (1979).
{au{gnE. A.} {fnStern}} and {au{gnS. M.} {fnHeald}}, {jtRev. Sci. Instr.} {vn50}, {pp1579} ({dy1979}).
S. M. Heald, private communication.
S. P. Cramer, T. K. Eccles, F. W. Kutzler, K. O. Hodgson, and L. E. Mortenson,J. Am. Chem. Soc. 98, 1287 (1976).
L. Pauling, inNature of the Chemical Bond, 3rd ed., Cornell University, Ithaca, NY, 1960, p. 98.
V. W. Hu, S. I. Chan, and G. S. Brown,Proc. Natl. Acad. Sci. 74, 3821 (1977).
D. H. Maylotte, J. Wong, R. L. St. Peters, F. W. Lytle, and R. B. Greegor,Science,214, 554 (1981).
J. M. Jaklevic, J. A. Kirby, A. J. Ramponi, and A. C. Thompson,Environ. Sci. Tech. 14, 437 (1980).
A. Bianconi, S. Doniach, and D. Lublin,Chem. Phys. Lett. 59, 121 (1978).
A. Desideri and G. Rotilio, inEXAFS and Near Edge Structure, A. Bianconi, L. Incoccia, and S. Stipeich, eds., Springer-Verlag, Berlin, 1983, p. 342.
S. S. Hasnain and B. Piggott, inEXAFS and Near Edge Structure, A. Bianconi, L. Incoccia, and S. Stipeich, eds., Springer-Verlag, Berlin, 1983, p. 358.
M. Bellii, A. Bianconi, E. Burattini, S. Mobilio, C. R. Natoli, L. Palladino, A. Reale, and A. Scafati, inEXAFS and Near Edge Structure, A. Bianconi, L. Incoccia, and S. Stipeich, eds., Springer-Verlag, Berlin, 1983, p. 345.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Gordon, B.M. Survey of chemical speciation of trace elements using synchrotron radiation. Biol Trace Elem Res 12, 153–159 (1987). https://doi.org/10.1007/BF02796676
Issue Date:
DOI: https://doi.org/10.1007/BF02796676