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) Inductively Coupled Plasma/Optical Emission Spectrometry (ICP/OES) (1) Sample Type Blood (2) (-) Fluid (2) Hair (1) RBCs (1) Serum or Plasma (3) Stool (1) Urine (2) Test Area Exposure (1) Therapeutics (1) Test Category Antihypertensives (1) Metals/Elements (1) Test Sub-Category Benzodiazepines (1) (-) Beta Blockers (1) (-) Macrominerals (1) Opiates/Opioids (2) Other (5) Toxic Elements (1) Trace Elements (1) Test Test Name 2551FL Magnesium - Total, Fluid 3043FL Metoprolol, Fluid