Detecting Fentanyl Analogs in Urine Using Precursor Ion Scan Mode Posted on March 14, 2023March 14, 2023 By Becky Carter Melissa M Budelier, Caroline E Franks, Christopher W Farnsworth, Stephen M Roper J Anal Tox; 46(2); 2022 Access article Chemistry, Crime Scene Investigation and Reconstruction, DREs / Traffic Safety Resource Prosecutors, Forensic Pathology and Medicolegal Death Investigation, Seized Drugs/Controlled Substances, Toxicology