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Industry-Leading Research

Employers & Toxicology

  • White Papers
  • Research Posters
  • Abstracts
  • Newsletters
  • Book Chapters
  • Scientific & Scholarly Publications

White Papers


  • Ruth E. Winecker, Edward J. Cone, David J. Kuntz, Brian Dorsey, Martin Jacques, Melanie Senter, Ronald R. Flege4, and Eugene D. Hayes. Prevalence of Cannabidiol and Tetrahydrocannabinol in Non-Regulated Workplace Drug Testing Urine Specimens. Submitted to SOFT Annual Meeting, San Diego, CA.
  • Edward J. Cone, Tory R. Spindle, George E. Bigelow, Ruth E. Winecker, John M. Mitchell, David Kuntz, Ronald R. Flegel and Ryan Vandrey. Cannabidiol (CBD) Does Not Convert to Delta-9-Tetrahydrocannabinol (Delta-9-THC) in the Body But the THC-Contaminated CBD May Produce Positive Marijuana Drug Tests. Submitted to SOFT Annual Meeting, San Diego, CA.
  • Martin Jacques and David J. Kuntz. Identification and Separation of Opioid Metabolites in Urine by LC-MS/MS. SOFT Annual Meeting, Minneapolis, MN. October 7, 2018.
  • Michael J. Herrera, David J. Kuntz, and Martin E. Jacques. Determination of an Alternate Source of Methcathinone in a Patient Sample. SOFT Annual Meeting, Atlanta, GA. October 21, 2015.
  • Michael Herrera and David Kuntz. Novel Conversion of an Extraction Method to Dilute and Shoot Procedure for the Quantitation of 16 Benzodiazepines in Human Urine Using UPLC/MS/MS. SOFT Annual Meeting, Orlando, FL October 30, 2013.
  • Michael Herrera and David J. Kuntz. Quantitative Chiral Determination of the d– and l- Enantiomers of Amphetamine & Methamphetamine in Oral Fluid using HPLC/MS/MS. SOFT Annual Meeting, Boston, MA July 4, 2012.
  • Kuntz, M. Meixner, and M.J. Coffing. Performance Evaluation of DAT Oral Fluid Barbiturate Assay on Roche Hitachi. AACC Annual Meeting, Atlanta, GA July 24-28, 2011.
  • MJ Coffing, D. Kuntz, M. Meixner, K. Armstrong, B. Masters. Performance Evaluation of DAT Oral Fluid Amphetamine, Methamphetamine, Opiates, and PCP. SOFT Annual Meeting, Richmond, VA October 2010.
  • D. Kuntz, M. Meixner, K. Armstrong, and MJ Coffing. Performance Evaluation of DAT Amphetamine, Methamphetamine, and Opiates Assays on Roche Hitachi. AACC Annual Meeting, Anaheim, CA , July 2010.
  • A. Gantverg, D. Kuntz, M. Feldman, and L. Wang. Ethylglucuronide and Ethyl Sulfate as Markers of Ethanol Consumption. S.O.F.T. Meeting, Austin, TX, October 3-7, 2006.


  • David J. Kuntz. “Pure CBD and CBD plus THC Metabolism Study.” MROALERT Vol XXXI, No 5. June 2020: Pages 1-2.
  • David J. Kuntz. “Fentanyl in the Workplace.” What’s the Buzz. May 2020: Pages 8-9.
  • David J. Kuntz. "Synthetic Cannabinoid Use in the Workplace. Drug Testing 2011-2015: Use Patterns and Prevalence." DATIA Focus. Spring 2016: Pages 28-33.
  • David J. Kuntz. “Synthetic Cannabinoids are Constantly Evolving.” Drug Screen Compliance. Newsletter. May 2015.
  • David J. Kuntz. “Synthetic Cannabinoids in the Workplace: Analysis of Three Years of Data.” DATIA Focus. Spring 2015: Pages 58-62.
  • David J. Kuntz. “Synthetic Cannabinoids Continues to be Abused.” Drug Screening Compliance. Blog. August 2014.
  • David J. Kuntz. “Testing for Alcohol Abuse in the Non-Regulated Workplace—Old and New Tests.” DATIA Focus. Summer 2014: Pages 44-45.
  • David J. Kuntz. “Detecting Synthetic Urine – Team Approach Required.” DATIA Focus. Winter 2014: Pages 36-41.
  • David J. Kuntz. “Emerging Alcohol Biomarkers.” Clinical & Forensic Toxicology News. September 2013.
  • David J. Kuntz. “Synthetic Cannabinoids Prevalence in the Workplace: A Twelve-Month Evaluation by Clinical Reference Laboratory.” DATIA Focus. Winter 2013: Pages 18-22.

Book Chapters

  • Advanced Analytical Techniques for the Confirmation of Drugs. Medical Review Officer Handbook. 10th Edition 2014. Published by AAMRO.
  • Confirmation: Traditional and Newer Analytical Techniques. Co-Author. Handbook of Workplace Drug Testing. Second Edition, 2008. AACC Press.
  • We are active members within the workplace drug testing community through training, discussions, and other programs in effort to advance our industry. Please contact us for additional information and resources. 

Scientific & Scholarly Publications

  • Svante Vikingsson, Ruth E Winecker, David J Kuntz, Michael Clark, Martin Jacques, E Dale Hart, Eugene D Hayes, Ronald R Flegel, Lisa S Davis, Fentanyl as a marker of illicit drug use in morphine-positive urine specimens from workplace drug testing, Journal of Analytical Toxicology, Volume 48, Issue 3, April 2024, Pages 185–190, 
  • C. Austin Zamarripa, Hayleigh E Tilton, Spencer Lin, Edward J Cone, Ruth E Winecker, Ronald R Flegel, David Kuntz, Melissa Beals, Martin Jacques, Michael Clark, Eric R Welsh, Lynn Wagner, Marcel O Bonn-Miller, Ryan Vandrey, Tory R Spindle, Pharmacokinetics and pharmacodynamics of five distinct commercially available hemp-derived topical cannabidiol products, Journal of Analytical Toxicology, 2024;, bkae001, 
  • Svante Vikingsson, E Dale Hart, Ruth E Winecker, Edward J Cone, David J Kuntz, Michael Clark, Martin Jacques, Eugene D Hayes, Ronald R Flegel, Prevalence of ∆8-tetrahydrocannabinol carboxylic acid in workplace drug testing, Journal of Analytical Toxicology, 2023;, bkad068, 
  • Svante Vikingsson, Ruth E Winecker, Edward J Cone, David J Kuntz, Brian Dorsey, Martin Jacques, Melanie Senter, Ronald R Flegel, Eugene D Hayes, Prevalence of Cannabidiol, ∆9- and ∆8-Tetrahydrocannabinol and Metabolites in Workplace Drug Testing Urine Specimens, Journal of Analytical Toxicology, Volume 46, Issue 8, October 2022, Pages 866–874, 
  • What’s the Buzz - Emerging Drugs (Aug. ‘22). Download PDF
  • MRO Alert (Aug. ‘21) Download PDF
  • Sholler, D.J., Spindle, T.R., Cone, E.J., Goffi, E., Kuntz, D., Mitchell, J.M., Winecker, R.E., Bigelow, G.E., Flegel, R.R., and Vandrey, R. (2021) Urinary Pharmacokinetic Profile of Cannabidiol (CBD), Δ9-Tetrahydrocannabinol (THC), and their Metabolites Following Oral and Vaporized CBD and Vaporized CBD-Dominant Cannabis Administration, Journal of Analytical Toxicology.
  • Tory R. Spindle, Edward J. Cone, David Kuntz, John M. Mitchell, George E. Bigelow, Ronald Flegal, and Ryan Vandrey. Urinary Pharmacokinetic Profile of Cannabinoids Following Administration of Vaporized and Oral Cannabidiol and Vaporized CDB-Dominant Cannabis. J.Anal. Toxicol. 2020;109-125.
  • A.K. Chaturvedi, J.L. Sershon, K.J. Craft, P.S. Cardona, J.W. Soper, D.V. Canfield, K.M. Dubowski, J.E. Whinnery, M.J. Leyva, C.E. Aston, S.M. Blevins, J.E. Wright, A.D. Fraser and D.J. Kuntz (2013) Effects of Fluid Load on Human Urine Characteristics Related to Workplace Drug Testing. J. Anal. Toxicol. 37:5-10.
  • David Day, David J. Kuntz, Michael Feldman, and Lance Presley. Detection of THCA in Oral Fluid by GC-MS-MS. J. Anal. Toxicol. 30:645-650, 2006.
  • Moore C, Feldman M, Harrison E, Rana S, Coulter C, Kuntz D, Agrawal A, Vincent M, Soares J. Disposition of Hydrocodone in Hair. J. Anal. Toxicol. 30:353-359, 2006.
  • Kielman, MF, Rindapaa, M, Gaspar, C, van Poppel, N, Breukel, C, van Leeuwen, S, Taketo, MM, Roberts, S, Smits, R, Fodde, R. (2002 ) Apc modulates embryonic stem-cell differentiation by controlling the dosage of beta-catenin signaling, 32(4):594-605. Nature Genetics. Download PDF
  • Stout, RL (1998) Hepatitis C Prevalence and the significance of liver enzymes elevations in the insurance population,Vol. 30, No. 1 J Insurance Medicine.
  • Oda, RP, Prasad, R, Stout, RL, Coffin, D, Patton, WP, Kraft, DL, O’Brien, JE, Landers, JP (1997) Capillary electrophoresis-based separation of transferrin sialoforms in patients with carbohydrate-deficient glycoprotein syndrome, 18, 1819-1826, Electrophoresis.
  • Prasad, R, Stout, RL, Coffin, D, Smith, JO (1997) Analysis of carbohydrate deficient transferrin by capillary zone electrophoresis, 18, 1814-1818, Electrophoresis.
  • Prasad, RP, Stout, RL, Smith, JO (1993) Carbohydrate Deficient Transferrin, Vol. 25, No. 4, J. Insurance Medicine.
  • Thurman, EM, Pedersen, MJ, Stout, RL, Martin T (1991) Distinguishing Sympathomimetic Amines from Amphetamine and Methamphetamine in Urine by Gas Chromatography/Mass Spectrometry, J. Analytical Toxicology.
  • Stout, Robert L. (1990) Update-Urine HIV Statistics, Vol. 22, No. 4, J. Insurance Medicine.1980 – High Density Lipoproteins as a tool in Risk Evaluation of Coronary Heart Disease. Transactions of the Association of Insurance Medical Directors of America, Vol 64, pgs. 238-245.
  • Stout, Robert L. (1989) Laboratory Analysis of Cocaine, Vol. 21, No. 3, J. Insurance Medicine. Stout, Robert L. (1989) Antibodies to HIV in Urine, Vol 21, No. 3, J. Insurance Medicine