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Osemwengie, L. Achieving More Accurate PCBs Structural Assignment Using Gas Chromatography and Mass Spectrometry “Ortho Effects” for all PCB Congeners. 2023 SETAC North America Annual Meeting, Louisville, KY, November 12 - 16, 2023.

Osemwengie, L., Jim Lazorchak, AND A. Batt. Determination of Synthetic Musk Compounds in Fish Fillets from Urban Streams and Rivers in the United States; EPA National Rivers and Streams Study Using Gas Chromatography and Mass Spectrometry. SETAC North America 43rd Annual Meeting, Pittsburg, PA, November 13 - 18, 2022.

Osemwengie, L. Accurate Structural Assignment Tool for PCBs Congeners, Using GC (front end) and Mass Spectrometric Ortho-Effects. SETAC North America 42nd Annual Meeting, Virtual, NC, November 14 - 18, 2021.

Osemwengie, L. Accurate Structural Assignment Tool for PCBs Congeners, Using GCxGC (front-end) and Mass Spectrometric Ortho-Effects. 2021 SETAC North America Annual Meeting, Virtual, November 14 - 18, 2021.

Osemwengie, L. Combined GC and MS “Ortho Effects” Studied for 209 PCB Congeners: An Additional Tool for Accurate Structural Assignment of PCBs. 2020 SETAC North America Annual Meeting, Virtual, November 15 - 19, 2020.

Osemwengie, L. Combined GC and MS "Ortho-Effects" Studied for 209 PCB Congeners: An Additional Tool for Accurate Structural Assignment of PCBs. 2020 SETAC North America Annual Meeting, Virtual, November 15 - 19, 2020.

Osemwengie, L. AND J. Morgan. PCBs in Older Buildings: Measuring PCB Levels in Caulk and Window Glazing Materials in Older Buildings. Environments. MDPI, Basel, Switzerland, 6(2):15, (2019). https://doi.org/10.3390/environments6020015

Osemwengie, L. AND J. Morgan. Determination of levels of polychlorinated biphenyls (PCBs) present in caulk and window glazing material samples from older buildings. Presented at SETAC North America 36th Annual Meeting, Salt Lake City, UT, November 01 - 05, 2015.

Osemwengie, L. Distinguishing PCB Isomeric Congeners with their Gas Chromatographic and Mass Spectrometric Ortho Effect using Comprehensive Gas Chromatography. Presented at Site Evaluation Tools and Emerging Technologies, Ashburn, VA, October 19 - 23, 2015.

Osemwengie, L., Wayne Sovocool, J. Morgan, A. Batt, AND Jim Lazorchak. Levels of Synthetic Musk Compounds in the United States National Rivers and Streams Using Gas Chromatography and Mass Spectrometry. Presented at Texas Southern University, Houston, TX, November 13 - 15, 2013.

OSEMWENGIE, L. I., G. SOVOCOOL, AND J. Morgan. The Mass Spectrometric Ortho Effect Studied for All 209 PCB Congeners. INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES. Elsevier Science Ltd, New York, NY, 352:51-64, (2015).

Wathen, J., L. Stahl, Jim Lazorchak, L. Osemwengie, Tony Olsen, AND B. Snyder. Contribution of Wastewater Treatment Plants to Concentrations of PBDEs, PFCs, PCBs, DDT and Synthetic Musks in Fish Tissue from U.S. Urban Waters. Presented at SETAC North America 33rd Annual Meetin, Long Beach, CA, November 11 - 15, 2012.

Mottaleb, A. M., L. I. OSEMWENGIE, R. M. Islam, AND G. SOVOCOOL. Identification of Bound Nitro Musk-Protein Adduct in Fish Liver By Gas Chromatography-Mass Sectrometry: Biotransformation, Dose-Response and Toxicokinetics of Nitro Musk Metabolites Protein Adducts in Trout Liver as Biomarker of Exposure. AQUATIC TOXICOLOGY. Elsevier Science Ltd, New York, NY, 106(107):164-172, (2012).

OSEMWENGIE, L. I. AND G. SOVOCOOL. Evaluation of Comprehensive 2-D Gas Chromatography-Time-Of-Flight Mass Spectrometry for 209 Chlorinated Biphenyl Congeners in Two Chromatographic Runs. CHROMATOGRAPHY RESEARCH INTERNATIONAL. SAGE-Hindawi Access to Research , London, Uk, 2011:1-14, (2011).

OSEMWENGIE, L. I. AND G. SOVOCOOL. Analysis of 209 chlorinated biphenyl congeners using comprehensive two-dimensional gas chromatography- time-of-flight mass spectrometry in the 1-D mode followed by the 2-D mode. Presented at Society for Environmental Toxicology and Chemistry National Meeting, New Orleans, LA, November 20, 2009.

OSEMWENGIE, L. I. AND G. SOVOCOOL. Evaluation of Enhanced Comprehensive 2-D Gas Chromatography-Time-Of-Flight Mass Spectrometry for the Separation of Recalcitrant Polychlorinated Biphenyl Isomers. Presented at Society for Environmental Toxicology and Chemistry North American 2009 Annual Meeting, New Orleans, LA, November 19 - 23, 2009.

BLOCKSOM, K. A., A. BATT, J. M. LAZORCHAK, L. I. OSEMWENGIE, A. DELINSKY, A. B. LINDSTROM, M. STRYNAR, M. MILLS, S. Nakayama, T. M. JICHA, M. Vazquez, AND D. W. BOLGRIEN. National rivers and streams assessment: fish tissue contaminants. Presented at SWIMS Conference, Chicago, IL, February 09 - 11, 2009.

OSEMWENGIE, L. I., G. SOVOCOOL, AND M. Libardoni. ANALYSIS OF 209 CHLORINATED BIPHENYL CONGENERS USING COMPREHENSIVE TWO-DIMENSIONAL GAS CHROMATOGRAPHY-TIME-OF-FLIGHT MASS SPECTROMETRY IN THE 1-D MODE FOLLOWED BY THE 2-D MODE. Presented at American Chemical Society Western Regional Meeting, Las Vegas, NV, September 24, 2008.

OSEMWENGIE, L. I. DETERMINATION OF SYNTHETIC MUSK COMPOUNDS IN MUNICIPAL WASTEWATER AND ESTIMATING BIOTA EXPOSURE IN THE RECEIVING WATERS. Presented at American Chemical Society Western Regional Meeting, Las Vegas, NV, September 24, 2008.

OSEMWENGIE, L. I. PHARMACEUTICALS AND PERSONAL CARE PRODUCTS IN THE ENVIRONMENT: OVERVIEW OF CHEMISTRY, SOURCES, AND FATE. Presented at North Carolina Regional Chapter, Society of Toxicology, Research Triangle Park, NC, October 23, 2008.

OSEMWENGIE, L. I. LEVELS OF SYNTHETIC MUSK COMPOUNDS IN MUNICIPAL WASTEWATER FOR ESTIMATING BIOTA EXPOSURE IN RECEIVING WATER. Presented at SETAC North America 28th Annual Meeting, Milwaukee, WI, November 11 - 15, 2007.

OSEMWENGIE, L. I. LEVELS OF SYNTHETIC MUSK COMPOUNDS IN MUNICIPAL WASTEWATER FOR ESTIMATION OF BIOTA EXPOSURE IN RECEIVING WATERS. Presented at International Conference on Analysis of Emerging Contaminants in the Environment, York, UK, March 07 - 09, 2007.

OSEMWENGIE, L. I. FATE OF SYNTHETIC MUSK COMPOUNDS IN AN AQUATIC ENVIRONMENT. Presented at SETAC North American 27th Annual Meeting, Montreal, QC, CANADA, November 05 - 09, 2006.

OSEMWENGIE, L. I. MONITORING SYNTHETIC MUSK COMPOUNDS IN MUNICIPAL WASTEWATER AND ESTIMATING BIOTA EXPOSURE IN THE RECEIVING WATERS. Presented at 5th National Monitoring Conference, San Jose, CA, May 07 - 11, 2006.

LAZORCHAK, J. M., C. G. DAUGHTON, G. T. ANKLEY, J. E. TIETGE, EARL E. GRAY, V. S. WILSON, R. W. FLICK, A. D. BIALES, D. L. LATTIER, D. C. BENCIC, M. KOSTICH, M. MILLS, T. L. JONES-LEPP, L. I. OSEMWENGIE, K. M. SCHENCK, AND S. GLASSMEYER. U.S. EPA'S RESEARCH ON THE ECOLOGICAL EXPOSURE, EFFECTS AND RISK MANAGEMENT OF ENDOCRINE DISRUPTION CHEMICALS AND PHARMACEUTICALS. Presented at South Platte Forum, Longmont, CO, October 27, 2005.