Avoid exposure to gadolinium or iodine based contrast media for 96 hours prior to sample collection. Do not use disinfectants containing iodine, such as Betadine®, during venipuncture. Drugs, nutritional supplements, vitamins, and minerals containing iodine may result in elevated findings. Promptly centrifuge and separate Serum or Plasma into a deionized water rinsed plastic screw capped vial using approved guidelines.
Plasma: Royal Blue top tube (Trace metal-free; EDTA), Serum: Royal Blue top tube (Trace metal-free; No additive)