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) (5) Enzyme-Linked Immunosorbent Assay (ELISA) (18) Enzyme Immunoassay (EIA) (5) Gas Chromatography/Mass Spectrometry (GC/MS) (5) Headspace Gas Chromatography (GC) (11) High Performance Liquid Chromatography/Time of Flight-Mass Spectrometry (LC/TOF-MS) (12) Sample Type Test Area Test Category Test Sub-Category Opiates/Opioids (5) Your search has returned no tests.