Social and Behavioral Sciences Commons^™

Validation Of Lc-Tof/Ms Screening For Drugs, Metabolites, And Collateral Compounds In Forensic Toxicology Specimens, Fessessework Guale, Shahriar Shahreza, Jeffrey Walterscheid, Hsin-Hung Chen, Crystal Arndt, Anna Kelly, Ashraf Mozayani

Ashraf Mozayani, Ph.D., PharmD

Liquid chromatography time-of-flight mass spectrometry (LC-TOF-MS) analysis provides an expansive technique for identifying many known and unknown analytes. This study developed a screening method that utilizes automated solid-phase extraction to purify a wide array of analytes involving stimulants, benzodiazepines, opiates, muscle relaxants, hypnotics, antihistamines, antidepressants and newer synthetic "Spice/K2" cannabinoids and cathinone "bath salt" designer drugs. The extract was applied to LC-TOF-MS analysis, implementing a 13 min chromatography gradient with mobile phases of ammonium formate and methanol using positive mode electrospray. Several common drugs and metabolites can share the same mass and chemical formula among unrelated compounds, but they are …