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Test Code SELE Selenium, Serum

Important Note


  • Follow collection and processing instructions provided in test catalog instructions
  • SPECIAL TUBE REQUIRED FOR ALIQUOT: Metal Free Specimen Vial (T173)
  • Serum must be removed from cellular fraction within 4 hours of specimen collection.
  • Specimen must be poured into Mayo metal-free, polypropylene vial, avoiding transfer of the cellular components of blood.
  • Do not insert a pipet into the serum to accomplish transfer
  • Do not ream the specimen with a wooden stick to assist with serum transfer

Mayo will accept aliquots accidently poured off into non-metal free tubes. If results elevated, Mayo will add a disclaimer to the results stating specimen received in a non-metal free tube and confirmatory testing on specimen in a metal free tube is suggested.

Additional Codes

Mayo Test ID
Sunquest Code


Reporting Name

Selenium, S

Useful For

Monitoring selenium replacement therapy

Method Name

Dynamic Reaction Cell-Inductively Coupled Plasma-Mass Spectrometry (DRC-ICP-MS)

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type


Specimen Required

Patient Preparation: High concentrations of gadolinium, iodine, and barium are known to interfere with most metal tests. If gadolinium-, iodine, or barium-containing contrast media has been administered, a specimen should not be collected for at least 96 hours.

Supplies: Metal Free Specimen Vial (T173)

Collection Container/Tube: 6-mL Plain, royal blue-top Vacutainer plastic trace element blood collection tube

Submission Container/Tube: 7-mL Metal-free, screw-capped, polypropylene vial

Specimen Volume: 0.8 mL

Collection Instructions:

1. Allow the specimen to clot for 30 minutes; then centrifuge the specimen to separate serum from the cellular fraction.

2. Remove the stopper. Carefully pour specimen into a metal-free, polypropylene vial, avoid transferring the cellular components of blood. Do not insert a pipette into the serum to accomplish transfer, and do not ream the specimen with a wooden stick to assist with serum transfer.

3. See Trace Metals Analysis Specimen Collection and Transport for complete instructions.

Specimen Minimum Volume

0.2 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Refrigerated (preferred) 28 days METAL FREE
  Ambient  28 days METAL FREE
  Frozen  28 days METAL FREE

Reject Due To

Gross hemolysis OK
Gross lipemia OK
Gross icterus OK

Reference Values

0-2 months: 45-90 mcg/L

3-6 months: 50-120 mcg/L

7-9 months: 60-120 mcg/L

10-12 months: 70-130 mcg/L

13 months-17 years: 70-150 mcg/L

≥18 years: 110-165 mcg/L

Day(s) Performed

Monday through Saturday

Test Classification

This test was developed, and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
SES Selenium, S 5724-0


Result ID Test Result Name Result LOINC Value
9765 Selenium, S 5724-0

Report Available

1 to 3 days