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 (7) Fluid (4) Hair (1) Meconium (1) Oral Fluid (Saliva) (1) (-) RBCs (1) Serum or Plasma (6) Stool (1) Tissue (1) Urine (6) Test Area Exposure (1) Test Category (-) Metals/Elements (1) Test Sub-Category Macrominerals (1) Test Test Name 3784R Potassium - Total, RBCs