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) (1) (-) Headspace Gas Chromatography (GC) (1) Sample Type Blood (2) Serum or Plasma (1) (-) Urine (1) Test Area Exposure (1) Test Category Analgesics (3) Antidepressants (2) Antiepileptics/Antiseizures (1) Antimicrobials (1) Bronchodilators (1) Sedative/Hypnotics (1) (-) Solvents (1) Stimulants (1) Sympathomimetic Amines (1) Test Sub-Category Other (1) Test Test Name 4355U Tetrahydrofuran, Urine