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 (3) (-) RBCs (1) Serum or Plasma (3) Urine (3) Test Area Test Category Test Sub-Category Test Test Name 3784R Potassium - Total, RBCs