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) (-) Headspace Gas Chromatography (GC) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (5) Sample Type Blood (1) Urine (1) Test Area Exposure (2) Test Category Other (2) Test Sub-Category Other (2) Test Test Name 4820B Xylenes Panel, Blood 4821U Xylene Exposure Panel, Urine