Evan L Floyd, PhD

Assistant Professor, Department of Occupational and Environmental Health

Evan Floyd is an Assistant Professor in the Department of Occupational and Environmental Health at the University of Oklahoma.  He has a dual focused within Environmental Health; Advancing exposure assessment techniques and assessing new tobacco products (chiefly e-cigs).  Dr. Floyd has worked as an analytical chemist with Battelle in the chemical weapons disposal program using GC, GC/MS and thermal desorption techniques and has practiced as an Industrial Hygienist for several years. He routinely utilizes these skills in his ongoing multidisciplinary projects, a few examples are: evaluating the persistence of e-cig aerosol on glass and cotton surfaces, battery performance of 2nd gen e-cigs under real-world use, and characterizing e-cig aerosol size at various power settings.  Dr. Floyd is in the process of setting up an analytical core that will offer nicotine and tobacco analysis for those unable to do their own.  The current capacity is limited to nicotine analysis from water, solid and gas matrices with biofluids (blood, plasma, urine, saliva and sweat) expected by Fall 2017 to include cotinine.  Please feel free to contact Dr. Floyd regarding any of his research projects or analytical services.


Degree-Granting Institutions
University of Alabama at Birmingham, Birmingham, AL, PhD, 2013
University of Alabama at Birmingham, Birmingham, AL, BS, 2003

Postgraduate Training
Assistant Professor, Department of Occupational and Environmental Health, University of Oklahoma Health Sciences Center, College of Public Health, 2013 – Present
Chemistry Fellowship, University of Alabama at Birmingham, Birmingham, AL, 2000 – 2003
SEPA Fellowship, University of Alabama at Birmingham, Birmingham, AL, 2000 – 2003

Grant Funding:

Current Funding

$5,000 - Contract and Collaborator with Cheri Marcham (PI) who was awarded a faculty development grant from Embry Riddle Aeronautical University.  $4,000 of the award is contracted to me for analytical support investigating electronic cigarette aerosol persistence on surfaces in airplanes due to ‘Stealth Vaping’. 

2014 – 2017
$1,000,000 - EPA Healthy Schools Initiative - Investigator (Lisa Holiday, PI). Balancing Sustainability with Environmental Quality. This project focuses of Metro Oklahoma City Schools that participated in the MAPS for Schools program that renovated or rebuilt the worst schools in the OKC metro area.  Some renovation decisions focused on aesthetics while others focused on school safety during tornados.  My role has been to assist in design of air sampling program and analyze all air samples for VOCs via TD-GCMS.

2013 – 2015
$90,000 - PI of Subcontract Award (R-21) – This project is an extension of my dissertation work at UAB.  I serve as a Co-Investigator on this exploratory grant that seeks to characterize and optimize the photothermal desorption of carbonaceous nanomaterial being used as adsorptive sampling media.  I have designed a custom photothermal unit that has wide ranging capabilities and simple user interface.  Developed the DAIC - Diffusive Adsoption Isotherm Chamber for measuring the VOC adsorption capacity of carbonaceous sorbents.

Completed Funding (within past 5 years)

2014 – 2015  
$20,000 - PI- Pilot Grant from the Deep South Center for Occupational Health and Safety (a NIOSH Education and Research Center) to develop a standard technique for generating Endotoxin aerosol of a known concentration followed by evaluation of three accepted sampling techniques (ASTM filter based technique, AGI 30 impinger and SKC biosampler impinger)  This will be useful for laboratories wishing to perform collection efficiency studies to assess the quality of the sampling techniques they support as well as samplers when deciding which sampling technique to utilize

2014 – 2015
$50,000 - PI - Pilot Grant from Oklahoma Tobacco Research Center investigating e-cigarette emission characteristics.  High output and user modifiable e-cigarettes were characterized across the range of user modifications and device parameters such as atomizer resistance, number of atomizers and applied voltage.  Characteristics studied include; aerosol count, mass and cumulative distributions, total mass emitted during use at varied conditions, performance over battery life, chemical assay of the emitted ‘vapor’ using GC/MS.

2013 – 2014
$46,000 - PI - Developmental Grant Awarded from Oklahoma Tobacco Research Center investigating e-cigarette vapor using human subjects.  Secondhand and thridhand e-cigarette ‘vapor’ is sampled from air and surfaces and analyzed for nicotine, VOCs and tobacco specific nitrosamines as well as aerosol count and size distributions measured during active vaping.

Selected Publications:

Ganapathy V., Manyanga J., Brame L., McGuire D., Sadhasivam B., Floyd E., Rubenstein D., Ramachandran I., Wagener T. Queimado L.  Electronic cigarette aerosols suppress cellular antioxidant defenses and induce significant oxidative DNA damage, PLOS ONE, Accepted May 2017

Floyd E, Wang J, Regens J. Fume Emission from a Low Cost 3-D printer with Various Filaments, Journal of Occupational and Environmental Hygiene, Accepted March 2017

Leavens, E. L., Driskill, L. M., Molina, N., Eissenberg, T., Shihadeh, A., Brett, E. I., Floyd, E., & Wagener, T. L. (in press). Comparison of a preferred versus non-preferred waterpipe tobacco flavor: Subjective experience, smoking behavior, and toxicant exposure. Tobacco Control.

Wang J.*, Hoang T., Floyd E., Regens J., Characterization of Particulate Metal and Oxides Emission from Stainless Steel Plasma Cutting, Journal of Occupational and Environmental Hygiene - Accepted for publication Nov. 2016

Wagener TL, Floyd EL, Stepanov I, Driskill LM, Frank SG, Meier E, Leavens EL, Tackett AP, Molina N, Queimado L. Have combustible cigarettes met their match? The nicotine delivery profiles and harmful constituent exposures of second-generation and third-generation electronic cigarette users. Tobacco Control. 2016

Jonghwa Oh, Evan L. Floyd, Mahesh Parit, Virginia A. Davis, and Claudiu T. Lungu, Heat Treatment of Buckypaper for Use in Volatile Organic Compounds Sampling.  Journal of Nanomaterials, vol. 2016, Article ID 3248059,  doi:10.1155/2016/3248059

Oh J, Floyd E.L., Watson TC, Lungu CT. Fabrication and adsorption characterization of single-walled carbon nanotube (SWNT) buckypaper (BP) for use in air samplers. Analytical Methods. 2016;8(21):4197-203.

Balanay J. G., Floyd E.L., Lungu C.T. Breakthrough Curves for Toluene Adsorption on Different Types of Activated Carbon Fibers: Application in Respiratory Protection, Annals of Occupational and Environmental Hygiene, 2014

Floyd, E. L., Sapag, K., Oh J., Lungu C.T. Photothermal Desorption of Single Walled Carbon Nanotubes and Coconut Shell Activated Carbons using a Continuous Light Source for Application in Air Sampling, Annals of Occupational Hygiene, 2014

Joe, P. S., Floyd E. L., Lungu C. T. Physical Fabrication and Verification of New NIOSH Digital Headform Designs with Skin-analog for Use in Fit Testing, Journal of the International Society for Respiratory Protection, Vol 2, 2013

Floyd, E. L., Lungu C. T., and Gohlke J. An Evaluation of Nearshore Sediment Data after the Deepwater Horizon Blowout. Journal of Environmental Science and Engineering, 1(3): 341-350, 2012.

Submitted for Review

Floyd E, Subekchhya A, Wang J, Johnson D. Evaluation of Second-Generation Electronic Cigarette Batteries Under Representative-Use Conditions, Tobacco Control, submitted May 2017

Floyd E, Henry J, Phillips M, Johnson D. Influence of Facial Hair Length, Coarseness, and Areal Density on Seal Leakage of a Tight-Fitting Half-Face Respirator, Journal of Occupational & Environmental Hygiene, resubmit May 2017

Floyd E, Queimado L, Wang J, Regens L, Johnson D., E-Cigarette Power Affects Count Concentration and Particle Size Distribution of Vaping Aerosol, submitted May 2017, Nicotine and Tobacco Research