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 (51) Fluid (3) Hair (2) Meconium (2) (-) RBCs (1) Serum or Plasma (54) Tissue (3) Urine (35) Test Area Test Category Test Sub-Category Test Test Name 3784R Potassium - Total, RBCs