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) (11) (-) Enzyme-Linked Immunosorbent Assay (ELISA) (2) Gas Chromatography (GC) (47) Gas Chromatography/Mass Spectrometry (GC/MS) (19) Headspace Gas Chromatography (GC) (19) Hematofluorometry (H) (2) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (114) High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS) (7) Immunoassay (IA) (1) Inductively Coupled Plasma/Mass Spectrometry (ICP/MS) (58) Inductively Coupled Plasma/Optical Emission Spectrometry (ICP/OES) (3) Ion Specific Electrode (ISE) (3) Spectrophotometry (SP) (1) Sample Type Serum or Plasma (1) Urine (1) Test Area Test Category Test Sub-Category Test Test Name 2541SP LSD Screen, Serum/Plasma 2541U LSD Screen, Urine