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) Enzyme Immunoassay (EIA) (1) Gas Chromatography (GC) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (7) Sample Type (-) Urine (1) Test Area Test Category Test Sub-Category Test Test Name 1352U o-Cresol, Urine