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) (4) Gas Chromatography (GC) (8) Gas Chromatography/Mass Spectrometry (GC/MS) (1) Headspace Gas Chromatography (GC) (1) (-) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (1) Inductively Coupled Plasma/Mass Spectrometry (ICP/MS) (5) Sample Type Blood (2) Serum or Plasma (1) (-) Urine (1) Test Area Drugs of Abuse (7) (-) Exposure (1) Therapeutics (23) Test Category Industrial/Environmental Toxins (1) Test Sub-Category Other (1) Test Test Name 1355U o-Toluidine, Urine