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JOHN T. CREED, Ph.D.
Dr. Creed graduated from Thomas More College with a B.S. in Chemistry. He obtained his Ph.D. in Analytical Chemistry from the University of Cincinnati. Upon completion of his doctorate, Jack began his professional career at the U.S. EPA in 1989 and has been a principal investigator for projects involving isotope dilution, arsenic in dietary and water samples, and the development of analytical methods for trace elements. Typical procedures employed include sample extraction followed by inductively coupled mass spectrometry. Jack was principal investigator on the development of EPA Method 200.8 for trace elements in waters and wastes by ion chromatography inductively coupled plasma spectrometry (ICP-MS), and EPA Method 321.8 for bromate in drinking waters by ICP-MS, as well as co-investigator on six other methods. These methods are usually adopted into Federal Regulations for the monitoring of drinking water under the Safe Drinking Water Act and used by the Office of Ground Water and Drinking Water in Unregulated Contaminant Monitoring Regulations to determine nationwide occurrence of targeted organic contaminants in drinking water.
Jack also conducts research in the area of ICP-MS detection of arsenic in food and water. This research includes the extraction, speciation and characterization of arsenic compounds in foods (carrots, seafood, and rice) in an effort to provide a more complete assessment of dietary arsenic exposure from food. In addition, Jack has conducted research on the speciation and preservation of inorganic arsenic in drinking water sources, a collaborative effort with the National Risk Management Research Laboratory’s chemists.
Recent Significant Publications
Kubachka, K., M. Kohan, S. Conklin, K. Herbin-Davis, J.T. Creed, D. Thomas. In Vitro Biotransformation of Dimethylarsinic Acid and Trimethylarsine Oxide by Anaerobic Microflora of Mouse Cecum Analyzed by HPLC-ICP-MS and HPLC-ESI-MS. Journal of Analytical Atomic Spectrometry 24: 1062-1068 (2009).
Creed, P., C. Gallawa, A. Young, C. Schwegel, D. Lytle, T. Sorg, J.T. Creed. Investigation of Sequential and Enzymatic Extraction of Arsenic from Drinking Water Distribution Solids Using ICP-MS. Journal of Environmental Monitoring8: 968-972 (2006).
Ackerman, A., P. Creed, A. Parks, M. Fricke, C. Schwegel, C. J.T. Creed, D. Heitkemper, N. Vela. Comparison of a chemical and enzymatic extraction of arsenic from rice and assessment of the arsenic absorption from contaminated water by cooked rice. Environmental Science and Technology39: 5241-5246 (2005).
Fricke, M., P. Creed, A. Parks, J. Shoemaker, C. Schwegel, J.T. Creed. Extraction and detection of a new arsine sulfide containing arsenosugar in mollusks by IC-ICP-MS and IC-ESI-MS/MS. Journal of Analytical Atomic Spectrometry 19: 1454-1459 (2004).
Creed, J.T., C. Brockhoff. Isotope dilution analysis of bromate in drinking water matrices by ion chromatography with inductively coupled plasma mass spectrometric detection. Analytical Chemistry 71: 722-726 (1998).