Test ID SEWB Selenium, Blood
Ordering Guidance
This test can be used to assess tissue stores of selenium. For routine assessment of selenium deficiency or toxicity, the preferred test is selenium urine.
For assessment of recent intake, order SES / Selenium, Serum.
Specimen Required
Patient Preparation: High concentrations of gadolinium and iodine are known to interfere with most metal tests. If either gadolinium- or iodine-containing contrast media has been administered, a specimen should not be collected for 96 hours.
Container/Tube: Royal blue top (EDTA) plastic trace element blood collection tube
Specimen Volume: 0.8 mL
Collection Instructions:
1. See Metals Analysis Specimen Collection and Transport for complete instructions.
2. Send whole blood specimen in original tube. Do not aliquot.
Useful For
Assessment of tissue stores of selenium
Special Instructions
Method Name
Triple-Quadrupole Inductively Coupled Plasma Mass Spectrometry (ICP-MS)
Reporting Name
Selenium, BSpecimen Type
Whole bloodSpecimen Minimum Volume
0.3 mL
Specimen Stability Information
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
Whole blood | Refrigerated (preferred) | 28 days | |
Ambient | 28 days | ||
Frozen | 28 days |
Reference Values
0-17 years: not established
≥18 years: 150-241 ng/mL
Day(s) Performed
Sunday
Report Available
2 to 8 daysPerforming Laboratory

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
84255
LOINC Code Information
Test ID | Test Order Name | Order LOINC Value |
---|---|---|
SEWB | Selenium, B | 5722-4 |
Result ID | Test Result Name | Result LOINC Value |
---|---|---|
65600 | Selenium, B | 5722-4 |