Human Exposure & Atmospheric Sciences Staff
Title: Research Chemist
EPA Division: Human Exposure and Atmospheric Sciences Division
EPA Branch: Methods Development and Applications Branch
Maribel’s experience at EPA covers different aspects of the research atmosphere: methods development for TO-14 and TO-17 and comparing the advantages and disadvantages of both sampling methods for atmospheric air monitoring. She has worked with the newest development in technology for gas chromatography and the variety of detectors to find the best conditions for analysis and data managing. During this time she worked with different international agencies (São Paulo, Brazil; Mexico City, Mexico; Ostrava, Czech Republic and others) giving them technical advice in the use of new VOCs analytical technologies and their application. She has also worked on exhaled breath sampling and analysis for biomarkers of exposure on MTBE and jet fuel.
Maribel worked with Brominated Flame Retardants (BFRs) on methods development to improve the performance and analysis of Polybrominated Diphenyl Ethers (PBDEs) by GC/MS/NCI. She was a team member that developed methods for sample cleanup, extraction and analysis of PBDEs in PUF, surface and window wipes, dust and others routes for human exposure for the SUPERB study.
At the present time, Maribel is working on VOCs. She is working with canisters and sorbent tubes on new ways to analyze TO-14, TO-15 and TO-17 compounds with the newest technology developed for ambient samples. Future works include analysis of Acrolein and gas and oil exploration. Additionally, she is been providing technical support for CETESB, São Paulo, Brazil.
- B.S., Chemistry, University of Puerto Rico, Cayey, 1987
- Research Chemist, USEPA, ORD, NERL, RTP, NC 2004-present
- Chemist, USEPA, OAQPS, RTP, NC 2003-2004
- Research Chemist, USEPA, ORD, NERL, RTP, NC 1991-2003
- Agricultural Chemist, Technician II, North Carolina Department of Agriculture, NC 1989-1991
- Parallel Technician, Roche Biomedical Laboratories, Burlington, NC 1989
- Pathology Data Analyst, Experimental Pathology Laboratories, Durham, NC 1987-1989
Select Awards and Honors:
- HEASD Team Award (Mexico Audit 2000), 2001
- Level III Scientific and Technological Achievement Award, “Advance Research on Use of Solid Adsorbents and Associated Analytical Equipment for Determination of Volatile Organic Compounds in Ambient Air,” 2002
- HEASD Commemorative Honor Award, Response Team, World Trade Center disaster recovery, 2002
- USEPA Commemorative Medallion, Response Team, World Trade Center disaster recovery, 2002
- NERL Community Service Special Achievement Award, 2006
- Analysis of polybrominated diphenyl ethers (PBDEs) in house dust and results from California homes participating in the SUPERB study Weathers, W.S., M. Colón, A. Hines, A. King, N.S. Tulve, D.H. Bennett, R. E. Moran, I. Hertz-Picciotto Science of the total environment (Feb 2013)
- Quantitative analysis of organophosphate and pyrethroid insecticides, pyrethroid transformation products, polybrominated diphenyl ethers and bisphenol A in residential surface wipe samples. Clifton, M. S., J.P. Wargo, W.S. Weathers, M. Colón, D. H. Bennett, N.S. Tulve. J. Chromatography A, 1273 (2013) 1-11.
- A Method Using Ultrasonication Coupled with Solid Phase Microextraction (SPME) in the determination of Polybrominated Diphenyl Ethers (PBDEs) in house dust. Weathers, W.S., M. Colón, A. Hines, A. King. SERMAC 2012, Raleigh, NC
- The Analysis of Polybrominated Diphenyl ethers in dust samples collected in homes of vulnerable populations Weathers, W.S., M. Colón, A. Hines, A. King, 2011. 21st International Society of Exposure Science Conference, Baltimore, MD
- Surface Wipe Samples for Multi-Residue Analysis of Selected Organophosphates, Pyrethroids, Pyrethroid Metabolites, Polybrominated Diphenyl Ethers and Bisphenol A by GC/MS. Clifton M., J.P. Wargo, M. Colón, 2011. 21st International Society of Exposure Science Conference, Baltimore, MD
- Combined Sample Preparation Methods for Selected Pyrethroids, Organophosphates, and Polybrominated Diphenyl Ethers in Surface Wipe and Passive Air Samples. Clifton M.S., W.S. Weathers, M. Colón., A. Hines, A. King, M. Smarr 2008.18th Annual ISEA/ISEE Joint Conference, Pasadena, CA
Human Exposure & Atmospheric Sciences Division
National Exposure Research Laboratory
US EPA Office of Research and Development
109 TW Alexander Drive
Research Triangle Park, NC 27709