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Iodine, Serum/Plasma
Test CodeIODI
Preferred Specimen
1 mL serum collected in a no additive trace metal-free (dark blue-top) tube
or
1 mL plasma collected in an EDTA trace metal-free (dark blue-top) tube
or
1 mL plasma collected in an EDTA trace metal-free (dark blue-top) tube
Minimum Volume
0.5 mL
Instructions
Separate plasma or serum from cells and pour off into an acid-washed vial (AWV) or other trace element free container.
Transport Container
Acid-washed, metal-free plastic vial
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 10 days
Refrigerated: 10 days
Frozen: Unacceptable
Refrigerated: 10 days
Frozen: Unacceptable
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Received frozen • Anticoagulants other than EDTA
Methodology
Inductively Coupled Plasma/Mass Spectrometry (ICP/MS)
FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Setup Schedule
Tuesday-saturday
Report Available
2-4 days
Reference Range
52-109 mcg/L
Clinical Significance
Iodine is an essential element that is required for thyroid hormone production. The measurement of iodine serves as an index of adequate dietary intake and iodine overload, particularly from iodine-containing drugs such as Amiodarone.
