Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Gas Chromatography (GC) (7) (-) Gas Chromatography/Mass Spectrometry (GC/MS) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (5) Sample Type Blood (2) Plasma (1) (-) Serum or Plasma (1) Urine (1) Test Area Test Category Test Sub-Category Test Test Name 5517SP Ethosuximide Confirmation (Qualitative), Serum/Plasma