Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Enzyme-Linked Immunosorbent Assay (ELISA) (16) Gas Chromatography (GC) (16) (-) Gas Chromatography (GC) and Gas Chromatography/Mass Spectrometry (GC/MS) (2) Gas Chromatography/Mass Spectrometry (GC/MS) (7) Headspace Gas Chromatography (GC) (16) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (26) High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS) (1) High Performance Liquid Chromatography/Time of Flight-Mass Spectrometry (LC/TOF-MS) (8) Spectrophotometry (SP) (1) Sample Type (-) Blood (2) Serum or Plasma (1) Test Area (-) Therapeutics (2) Test Category Analgesics (1) Antidepressants (1) Test Sub-Category Opiates/Opioids (1) Tricyclic (1) Test Test Name 8706B Protriptyline, Blood 8723B Pentazocine, Blood