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 (37) Fluid (8) Hair (1) Oral Fluid (Saliva) (1) (-) RBCs (1) Serum or Plasma (21) Stool (1) Tissue (7) Urine (19) Test Area (-) Exposure (1) Test Category Metals/Elements (1) Test Sub-Category Macrominerals (1) Test Test Name 3784R Potassium - Total, RBCs