Yale New Haven Hospital

Department of Laboratory Medicine
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Porphyrins, quantitative, timed urine

Lab Section: 

Sendout Reference


Lab Location: 


Reference Lab: 



Test ID: 




High-Performance Liquid Chromatography (HPLC) with Fluorometric Detection




7 days

Specimen Requirements: 

Collection: 45.0 mL 24 Hour Urine
Pediatric volume: 15 mL.
Amber, 60-mL urine bottle; 24-Hour volume is required; Patient should abstain from alcohol for 24 hours prior to as well as during collection.
Add 5 g of sodium carbonate (T272) as preservative at start of collection. This preservative is intended to achieve a pH of >7. Do not substitute sodium bicarbonate for sodium carbonate. The container should be refrigerated and protected from light as much as possible during collection. An aliquot should be frozen when collection is complete.
Transport: Ship frozen.
Handling: Protect specimen from light; Stored refrigerated or ambient.
Unacceptable conditions: Specimen not protected from light, pH <5.0
Stability: Frozen: 7 days



Clinical Indications: Preferred screening test for congenital erythropoietic porphyria and porphyria cutanea tarda and during symptomatic periods for acute intermittent porphyria, hereditary coproporphyria, and variegate porphyria when specimen transport will be longer than 72 hours (if the specimen will be received at Mayo Medical Laboratories within 72 hours of collection, PQNRU / Porphyrins, Quantitative, Random, Urine is recommended)

Pick up 24 hour urine container with 5 g of sodium carbonate as preservative from Lab Med Specimen Processing by calling 688-2444

Reference Interval: 

See patient report or consult reference laboratory website.


CPT Code(s): 

84110, 84120

Last Changed: 

9/2/2017 11:05:25

Last Reviewed: 

9/2/2017 11:05:32