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 (4) Fluid (2) (-) RBCs (1) Serum or Plasma (3) Stool (1) Urine (3) Test Area (-) Exposure (1) Test Category (-) Metals/Elements (1) Test Sub-Category Macrominerals (1) Test Test Name 3784R Potassium - Total, RBCs