Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) (-) Colorimetry (C) (1) Enzyme-Linked Immunosorbent Assay (ELISA) (13) Enzyme Immunoassay (EIA) (7) Gas Chromatography (GC) (62) Gas Chromatography/Mass Spectrometry (GC/MS) (10) Headspace Gas Chromatography (GC) (2) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (72) (-) High Performance Liquid Chromatography/Tandem Quadrupole Time of Flight Mass Spectrometry. (4) (-) High Performance Liquid Chromatography/Time of Flight-Mass Spectrometry (LC/TOF-MS) (6) Sample Type Blood (3) Serum or Plasma (3) Tissue (1) Urine (4) Test Area Drugs of Abuse (7) Therapeutics (4) Test Category Anesthetics (4) Hallucinogens (3) NPS/Designer Drugs (3) Stimulants (1) Test Sub-Category Opiates/Opioids (3) Other (8) Your search has returned no tests.