Laboratory Test Information Guide

Details for Porphyrins, Urine, Random

Test Name: Porphyrins, Urine, Random
Alternate Name(s): Uroporphyrin I
Uroporphyrin III
Heptacarboxylic Acid
Hexacarbolic Acid
Pentacarboxylic Acid
Coproporphyrin I
Coproporphyrin III
Laboratory: Core
Specimen Type: 20 mL Urine (Random)
Collection Information: Collect urine in a sterile container and transport to the Lab ASAP.

Refrigerate and protect from light.
Test Schedule: As required
Turnaround time from when specimen
is received in testing laboratory:
10 days
Reference Range: Note: Reference ranges are for adults only. Reference ranges not available for individuals 17 years of age and younger.

Uroporphyrin I: 0.4-3.9 umol/mol cr
Uroporphyrin III: <= 2.0 umol/mol cr
Heptacarboxylic Acid: <= 1.3 umol/mol cr
Hexacarbolic Acid: <= 0.7 umol/mol cr
Pentacarboxylic Acid: <= 1.0 umol/mol cr
Coproporphyrin I: 0.3-8.5 umol/mol cr
Coproporphyrin III: 1.7-26.3 umol/mol cr
Copro III/Copro I ratio: 2.6-5.3

Interpretation provided on report.
Effective Date: 2011-11-09
Revised Date:  
Critical Value:  
Interpretive Comments:  
Special Processing: Specimen must be sent to laboratory ASAP. pH should be adjusted with Sodium Carbonate immediately upon receipt in laboratory. Final pH should be 8 to 10. Protect specimen from light.
Quantitation may only be done if a preliminary screen is positive.
This collection is not suitable for PBG/ALA analysis. For PBG/ALA analysis see "Porphyrin Precursors".
Method of Analysis: HPLC
Critical Information Required:  
Storage & Shipment: Store and send frozen. Protect from light.
System Codes: 
Referred To: In-Common Laboratories

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