Conversion of water-soluble CBD to Δ9-THC in synthetic gastric fluid—An unlikely cause of positive drug tests Posted on October 26, 2023 By Jeff Teitelbaum E. Dale Hart, Lawrance Mullen, Svante Vikingsson, Edward J. Cone, Ruth E. Winecker, 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