24 hours after setup at PeaceHealth Laboratories’ reference lab.
CPT Code:
83735-90
Specimen Collection Details
Collection:
Aliquot from a well mixed 24-hour urine in a metal-free container. Refrigerate during collection, storage, and transport. Also acceptable: Random urine. Collection container should be free of metal.
Handling:
It is required to note total 24-hour volume and to list all medications on requisition form. Adjust pH to 1.0 by adding 6N HCl. If random collection, indicate “random” on specimen and on paperwork and list all medications. Refrigerate. Send aliquot in metal free specimen bottle. Do not use containers with metal caps.
Stability:
Acidified specimen stable 7 days ambient, 7 days refrigerated, or 1 year frozen.
Standard Volume:
4 mL aliquot or random urine.
Minimum Volume:
0.5 mL aliquot or random urine.
Transport:
Refrigerated, or frozen on dry ice.
Rejection Criteria:
Specimen containing preservative other than HCl, or specimen in container with metal.
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