个人简介

B.S., Chemistry & Mathematics, Baker University 1979 Ph.D., Analytical Chemistry, University of Texas 1983 Postdoctoral, Analytical Chemistry, Indiana University 1983-1986

研究领域

Analytical Chemistry; Toxicology

Dr. Rayson’s research interests pertain to the investigation of metal atoms and ions in complex chemical environments. These studies involve the elucidation of atomization, ionization, and excitation mechanisms occurring within the high temperature systems of inductively coupled argon plasma discharges and resistively heated graphite furnace atomizers. Alternately, studies of the chemical moieties on the cell walls of plants which are responsible for the selective binding of heavy metal ions from contaminated waters and soils are also pursued in the Rayson laboratory. The elucidation of these complex chemical processes necessitates the implementation of numerous, independent techniques. These “tools” have included the use of temporally and spectrally resolved atomic emission and absorption spectroscopies, laser excited luminescence measurements in both time and wavelength domains, multi-nuclear NMR spectroscopy, and frontal affinity chromatography. An example of the application of such an arsenal of techniques has been the elucidation of multiple (i.e., three) metal-coordination sites involving carboxylate groups and two additional ion-exchange site containing carboxylate and sulfonate groups, respectively, on the surface of a cell wall material derived from the plant Datura innoxia.

近期论文

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Photoluminescent Distinction among Plant Life Forms Using Phosphate Buffered Saline Extract Solutions; Timothy L. Danielson, Safwan Obeidat, G. D. Rayson, R. Estell, E. L. Fredrickson, and D.M. Anderson, Appl. Spectros., (In Press, 2006). Impact of Solution pH on the Identification of Plants Using Fluorescence Spectroscopy with Buffered Saline Extracts; Timothy L. Danielson, Safwan Obeidat, G. D. Rayson, D. M. Anderson, R. Estell, E.L. Fredrickson, and K.M. Havstad, Range Ecology Manage, (In Press, 2006). A Unifying Description of Modern Analytical Instrumentation within a Course on Instrumental Methods of Analysis, Gary D. Rayson, J. Chem. Ed., 81 (2004) 1767-1771. Simultaneous Multi-element Detection of Metal Ions Bound to a Datura innoxia Material; Patrick A. Williams and G. D. Rayson, J. Hazard. Mater. 99 (2003) 277-285. Fluorometry as a Tool for Real-time Botanical Analysis; Anderson, D.M.; Parker, E.; Ralphs, M.; Gray, P.; Rayson, G.; Estell, R.; Daniel, D.; Fredrickson, E.; Havstad, K.; and Wagner, J., African J. Range & For. Sci. 20 (2003) B1.44 Competitive Metal Binding to a Silicate-Immobilized Humic Material; Peter C. Stark, Gary D. Rayson, J. Hazard Mater. (Submitted, 2003). Physical Characterization of a Polysilicate Immobilized Biosorbent; Patrick A. Williams, Gary D. Rayson, J. Hazard Mater. (Submitted, 2003). Impact of Filter Paper on Fluorescense Measurements of Buffered Saline Fitrates; Timothy L. Danielson, Gary D. Rayson, Dean M. Anderson, Rick Estell, Ed L. Fredrickson, Barbara S. Green, Talanta, 59 (2003) 601-604. Impact of Filter Paper on Fluorescence Measurements of Buffered Saline Filtrates; Timothy L. Danielson, Gary D. Rayson, Dean M. Anderson, Rick Estell, Ed L. Fredrickson, Barbara S. Green, Talanta 59 (2002) 601-607. NMR Spectrometry Of Cd Binding Sites On Algae And Higher Plant Tissues; Hongying Xia and G. D. Rayson, ì113Cd, Adv. Environ. Research, 7 (2002) 157-167. Affinity Distributions of Lead Ion Binding to an Immobilized Biomaterial Derived from Cultured Cells of Datura innoxia; Shan Lin, L. R. Drake and G. D. Rayson, Adv. Environ. Research 6 (2002) 523-532. 113Cd NMR Spectrometry Of Cd Binding Sites On Algae And Higher Plant Tissues; Hongying Xia and G. D. Rayson, Advances in Environmental Research, Advances in Environ. Research, v.7(#1) pp. 157-167, Nov 2002. Affinity Distributions of Lead Ion Binding to an Immobilized Biomaterial Derived from Cultured Cells of Datura innoxia; Shan Lin, L. R. Drake and G. D. Rayson, Adv. Environ. Research, v. 6(#4) pp. 523-532 Oct 2002. Statistical analyses of fluorometry data from chloroform filtrate of lamb feces; A. Mukherjee, D.M. Anderson, D.L. Daniel, L.W. Murray, G. Tisone, E.L. Fredrickson, R.E. Estell, G.D. Rayson and K.M. Havstad, J. Range Manage. 54 (2001) 370-377. Phytofiltration: Investigations of Heavy Metal Binding to a Biosorbent Derived from Datura innoxia; G.D. Rayson, L.R. Drake, Shan Lin, Hongying Xia, P.A. Williams, and P.J. Jackson Proceedings for the 10th Colloquium of the Sfb 193: Treatment of Wastewaters Containing Heavy Metal Compounds, 14 (2000) 161. NMR Studies of Metal Binding to a Datura Innoxia Biomaterial; Hongying Xia and G. D. Rayson, ìSolid-State 113Cd, Adv. Environ. Research, 4 (2000) 69-77. Comparison of Metal Ion Binding to Immobilized Biogenic Materials in a Flowing System; P. C. Stark and G. D. Rayson, Adv. Environ. Research, 4 (2000) 113-122. Solid-State 113Cd NMR Studies of Metal Binding to a Datura Innoxia Biomaterial; Hongying Xia and G. D. Rayson,Advances in Environ. Research, 4 (2000) 69-77. Atomization Interferences in ICP Atomic Absorption Spectroscopy; C. E. Hensman and G. D. Rayson, J. Anal. Atomic Spectrom. 14 (1999) 1025-1031. Survey of Non-viable Biosorbents for Toxic Metal Removal; P. C. Stark, G. D. Rayson and D. W. Darnall, Advances in Environ. Research 3 (1999) 74-82.