Prevalence of Δ8-tetrahydrocannabinol carboxylic acid in workplace drug testing Posted on November 21, 2023 By Jeff Teitelbaum Svante Vikingsson, E. Dale Hart, Ruth E. Winecker, Edward J. Cone, David J. Kuntz, Michael Clark, Martin Jacques, Eugene D. Hayes, Ronald R. Flegel Journal of Analytical Toxicology; 2023 Access article Cannabis and Cannabinoids, Chemistry, Crime Scene Investigation and Reconstruction, DREs / Traffic Safety Resource Prosecutors, Forensic Pathology and Medicolegal Death Investigation, Seized Drugs/Controlled Substances, Toxicology