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) Gas Chromatography (GC) (12) Gas Chromatography (GC) and Gas Chromatography/Mass Spectrometry (GC/MS) (2) Gas Chromatography/Mass Spectrometry (GC/MS) (2) (-) Headspace Gas Chromatography (GC) (2) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (14) Inductively Coupled Plasma/Mass Spectrometry (ICP/MS) (6) Sample Type (-) Blood (2) Serum or Plasma (1) Urine (1) Test Area Test Category Test Sub-Category Test Test Name 4355B Tetrahydrofuran, Blood 4510B Toluene, Blood