Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) (-) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (1) Sample Type Blood (14) (-) Fluid (1) Hair (1) Meconium (3) Serum or Plasma (12) Tissue (3) Urine (8) Test Area Test Category Test Sub-Category Test Test Name 5645FL Opiates - Free (Unconjugated) Confirmation, Fluid