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) (2) Gas Chromatography/Mass Spectrometry (GC/MS) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (20) High Performance Liquid Chromatography/Time of Flight-Mass Spectrometry (LC/TOF-MS) (1) Inductively Coupled Plasma/Mass Spectrometry (ICP/MS) (2) Sample Type Blood (2) (-) Serum or Plasma (1) (-) Tissue (1) Urine (5) Test Area Therapeutics (2) Test Category Antidepressants (2) Test Sub-Category Tricyclic (2) Test Test Name 3220SP Nortriptyline, Serum/Plasma 3220TI Nortriptyline, Tissue