ELISA Screens for Fentanyl in Urine Are Susceptible to False-Positives in High Concentration Methamphetamine Samples Posted on June 7, 2023 By sdargoltz Dustin L Abbott, Jennifer F Limoges, Kelly J Virkler, Seth J Tracy, Gregory G Sarris J Anal Tox; 46(4); 2022 Access article Chemistry, Crime Scene Investigation and Reconstruction, DREs / Traffic Safety Resource Prosecutors, Forensic Pathology and Medicolegal Death Investigation, Seized Drugs/Controlled Substances, Sexual Assault / SANE, Toxicology