Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Inductively Coupled Plasma/Mass Spectrometry (ICP/MS) (1) Sample Type Blood (1) Fluid (1) Hair (1) RBCs (1) Serum or Plasma (1) Stool (1) (-) Urine (1) Test Area (-) Exposure (1) Test Category Metals/Elements (1) Test Sub-Category Benzodiazepines (1) Biomarkers (1) Carboxylic Acids (3) (-) Macrominerals (1) Opiates/Opioids (1) Other (35) Synthetic Cathinone (1) Toxic Elements (4) Trace Elements (3) Test Test Name 2551U Magnesium - Total, Urine