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Test Code USLNQ Selenium, Urine Quant.

Collection Container

24 hour urine jug

Specimen Required

24 hour urine

Transport Temperature


CPT Codes


Minimum Volume

5 mLs of 24 hour urine

Specimen Volume

20 mLs of 24 hour urine


Room temperature: 7 day, Refrigerated: 14 days, Frozen: 14 days.


High concentrations of gadolinium and iodine are known to interfere with most metals tests. If either gadolinium- or iodine-containg contrast media has been administered, a specimen should not be collected for 96 hours.