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Urine Porphyrins, 24 Hour
MessagePatient Preparation: Patient should abstain from alcohol for 24 hours prior to, as well as during, collection. 1. Collect a 24-hour urine specimen. 2. Add 5 g of sodium carbonate as preservative at start of collection. This preservative is intended to achieve a pH of >7. Do not substitute sodium bicarbonate for sodium carbonate. 3. The container should be Refrigerated and protected from light as much as possible during collection.
Test Code
LAB3925 PORQN
Alias/See Also
PORQN
CPT Codes
84110| 84120
Includes
@BKRCERMSGREFRESH(2302793)@ @BKRCERMSGREFRESH(2302794)@
Instructions
Processing Instructions (Lab use only): The addition of preservative must occur prior to the beginning of the collection. Aliquot should be frozen and protected from light when collection is complete. Minimum Testing Volume: 15.0 mL Preserved 24 hour Urine Transport Temperature: Frozen Stability: Ambient: N/A Refrigerated : N/A Frozen: 7 days Light Protected Causes for Rejection: All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.
Report Available
5-Days
Clinical Significance
1230170012
Last Updated: May 18, 2026