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Evan Floyd

Associate Professor

Evan L. Floyd, Ph.D., CIH

Contact Information

Phone: (405) 271-8001, x41162

Office: Hudson College of Public Health

801 Northeast 13th Street, Room 427

Post Office Box 26901

Oklahoma City, Oklahoma 73126-0901




I am multidisciplinary researcher that blends analytical chemistry, engineering, and industrial hygiene into public health.  I am the laboratory director for the OEH department and the founder/director of the Environmental Health Analytical Core (EHAC).  Essentially, I am a methodologist that likes to build scientific contraptions and figure out better ways of measuring things.

I have a BS in chemistry, a PhD in environmental health (Industrial Hygiene), work experience as an analytical chemist for a major defense contractor, work experience as a project manager in water permitting and industrial hygiene for a testing lab, and currently offer consulting services in industrial hygiene and aerosol science fields when I am not researching and teaching.

During my graduate studies I developed a novel desorption technique (PhotoThermal Desorption) for VOCs collected on a novel sorbent (bucky paper).  As faculty at the OU Hudson College of Public Health in 2013, I continued developing PhotoThermal Desorption and began exploring other interests in aerosol science.  I have since established research themes in electronic cigarette aerosol characterization, nicotine delivery, puff topography and device characteristics.  I have also investigated the effect of facial hair on respirator fit and during the COVID-19 pandemic helped to develop a 3D printed respirator that was granted FDA EUA. I led a study examining the effect of extended use and re-use of surgical masks and FFRs on worker protection.  I have an ongoing projects to improve protection from surgical masks, a multi-year project continuing PhotoThermal Desorption, and am finishing a study measuring the LD99 of UVC on SARS-CoV-2.




  • PhD, Environmental Health Sciences, University of Alabama at Birmingham, 2013
  • BS, Chemistry, University of Alabama at Birmingham, 2003



  • Associate Professor, Department of Occupational and Environmental Health, OUHSC, 2022–present
  • Assistant Professor, Department of Occupational and Environmental Health, OUHSC, 2013–2022
  • Graduate Assistant, Environmental Health Sciences Department, University of Alabama at Birmingham, 2008–2013
  • Project Manager, Guardian Systems Inc., 2007–2009
  • Analytical Chemist, Battelle Memorial Institute, Anniston Army Depot Chemical Agent Disposal Facility, 2004–2007


  • OEH 5723 Fundamentals of Occupational and Environmental health Science
  • OEH 5742 Industrial Hygiene & Env. Measurements
  • OEH 6793 Aerosol Science
  • OEH 6103 Research Methods in Occupational and Environmental Health
  • OEH 6473 Risk Assessment (Occupational Risk Assessment)
  • OEH 5960 Directed Readings
  • OEH 5990 Special Studies
  • OEH 5980 Research for Master’s Thesis
  • OEH 6980 Research for Doctoral Dissertation


Research Interests:

  • Assessment of respiratory protection for use during a pandemic; design and development of 3D printed respirator, design and development of a fit aid to improve surgical mask protection, assessment of decontamination techniques on respiratory PPE filtration efficiency.
  • Improving exposure assessment techniques for organic vapors using novel sorbents, developing an improved diffusive sampler, and advancing a novel desorption technique (PhotoThermal Desorption).
  • Application of the PhotoThermal Desorption technique to broader environmental and emergency preparedness fields (soil and water analysis, surface deposition, skin analysis, baggage screening for air travel, and hazmat fast response screening).
  • Improving analytical capacity to properly measure e-cigarette use behavior; device measurement, puff topography, and puff simulation.
  • Environmental tobacco smoke and vaping aerosol exposures.


Link to Dr. Floyd's current publications

Select publications:

  1. Floyd EL, Greenlee S, On T, Sadhasivam B, Queimado LM. The Effect of Flow Rate on a Third Generation Sub-Ohm Tank Electronic Nicotine Delivery System - Comparison of CORESTA Flow Rates to more Realistic Flow Rates.  International Journal of Environmental Research and Public Health, July 2021.
  2. Florez FE, Thibodeau T, Oni T, Floyd E, Khajotia S, Cai C.  Size-resolved spatial distribution analysis of aerosols with or without the utilization of a novel aerosol containment device in dental settings. Physics of Fluids, July 2021.
  3. Fakherpour A*, Jahangiri M, Seif M, Charkhand H, Abbaspour S, Floyd EL. Quantitative fit testing of filtering face-piece respirators during the COVID-19 pandemic reveals anthropometric deficits in most respirators available in Iran. Journal of Environmental Health Science and Engineering. 2021 Jun;19(1):805-17.
  4. Shedd, Jacob; Kuehster, Wyatt; Ranjit, Smriti; Hauser, Adam; Floyd, Evan; Oh, Jonghwa; Lungu, Claudiu. Determining the Thermal Properties of Buckypapers Used in Photothermal Desorption. ACS Omega. 2021;6(8):5415-5422. doi:10.1021/acsomega.0c05613
  5. Cai, Changjie and Floyd, Evan. Effects of Sterilization With Hydrogen Peroxide and Chlorine Dioxide on the Filtration Efficiency of N95, KN95, and Surgical Face Masks. JAMA Netw Open. 2020;3(6):e2012099. doi:10.1001/jamanetworkopen.2020.12099