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) Enzymatic Assay (EZA) (1) Enzyme-Linked Immunosorbent Assay (ELISA) (8) (-) Enzyme Immunoassay (EIA) (1) Gas Chromatography (GC) (9) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (42) High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS) (2) Sample Type Urine (2) Test Area Exposure (1) Therapeutics (1) Test Category Analgesics (1) Other (1) Test Sub-Category Opiates/Opioids (1) Other (1) Test Test Name 1352U o-Cresol, Urine 3236U Opiates Screen, Urine