Inductively Coupled Plasma-Mass Spectrometry (ICP-MS)
Monitoring iodine excretion rate as an index of adequate dietary iodine intake.
age 0-17 years: not established; age >=18 years: 75 - 851 mcg/24 hour.
Administration of iodine-based contrast media and drugs containing iodine, such as amiodarone, will yield elevated results.
2 - 4 days
- Urinary Free Iodine
Collect 24 hour urine specimen with no preservative. Aliquot 10 mL into a clean plastic container and refrigerate. Record total 24 hour urine volume and collection dates/times on request form. Note: if this test is used in conjunction with the (131)I Updake Test, the specimen collection should begin immediately after the dose of (131)I is given.
Test sent to Mayo Medical Laboratories.