Analysis, identification and confirmation of synthetic opioids using chloroformate chemistry: Retrospective detection of fentanyl and acetylfentanyl in urine and plasma samples by EI-GC-MS and HR-LC-MS

• Carlos A. Valdez ,

  Roles Conceptualization, Data curation, Writing – original draft, Writing – review & editing

  * E-mail: valdez11@llnl.gov

  Affiliations Forensic Science Center, Lawrence Livermore National Laboratory, Livermore, CA, United States of America, Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, CA, United States of America, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA, United States of America

  https://orcid.org/0000-0002-8641-9077

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• Roald N. Leif,

  Roles Data curation, Formal analysis, Investigation, Writing – review & editing

  Affiliations Forensic Science Center, Lawrence Livermore National Laboratory, Livermore, CA, United States of America, Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, CA, United States of America, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA, United States of America

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• Todd H. Corzett,

  Roles Conceptualization, Formal analysis, Investigation, Writing – review & editing

  Affiliations Forensic Science Center, Lawrence Livermore National Laboratory, Livermore, CA, United States of America, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA, United States of America, Biosciences and Biotechnology Division, Lawrence Livermore National Laboratory, Livermore, CA, United States of America

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• Mark L. Dreyer

  Roles Formal analysis, Methodology, Writing – review & editing

  Affiliations Forensic Science Center, Lawrence Livermore National Laboratory, Livermore, CA, United States of America, Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, CA, United States of America, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA, United States of America

  https://orcid.org/0000-0002-8691-9063

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