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) (2) Sample Type Blood (3) Fluid (2) Hair (1) (-) RBCs (2) Serum or Plasma (2) Stool (2) Urine (2) Test Area Diagnostic Aids (1) (-) Exposure (2) Test Category Metals/Elements (2) Test Sub-Category (-) Macrominerals (2) Other (3) Toxic Elements (10) Trace Elements (7) Test Test Name 2551R Magnesium - Total, RBCs 3784R Potassium - Total, RBCs