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) Gas Chromatography (GC) (5) (-) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (1) Sample Type Serum or Plasma (1) Urine (1) Test Area (-) Exposure (2) Newborn Tox (1) Therapeutics (40) Test Category Industrial/Environmental Toxins (1) Other (1) Test Sub-Category Other (2) Test Test Name 1355U o-Toluidine, Urine 3250SP Oxalate, Serum/Plasma