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) Inductively Coupled Plasma/Optical Emission Spectrometry (ICP/OES) (1) Sample Type Blood (2) Fluid (1) Hair (1) (-) RBCs (1) Serum or Plasma (4) (-) Stool (1) Urine (1) Test Area Exposure (2) Test Category Metals/Elements (2) Test Sub-Category (-) Macrominerals (2) Metals/Elements (1) Other (1) Toxic Elements (3) Trace Elements (1) Test Test Name 2551R Magnesium - Total, RBCs 2551ST Magnesium - Total, Stool