Test Overview
Method
High Performance Liquid Chromatography (HPLC)
Result Included
Coproporphyrin I; Coproporphyrin III; Uroporphyrin I; Uroporphyrin III; Heptacarboxylic Acid; Hexacarboxylic Acid; Pentacarboxylic Acid; Protoporphyrin; Interpretation
Specimen
Specimen Type
Feces (Random)Volume
Sample Volume
50 g
Collection & Handling
Handling Information
Store and submit specimen protected from light.
Store and send frozen.
Additional Information
Quantitative analysis may only be done if a preliminary Porphyrin screen is positive.
Rejection Criteria
| Criteria | Specification |
|---|---|
| Specimen | Not protected from light |
Performance & Interpretation
Turnaround Time
8 days
Results
Name
Units
Reference Range
Conversion
-
Coproporphyrin Inmol/gAdult: ≤13µg/g x 1.53
-
Coproporphyrin IIInmol/gAdult: ≤12µg/g x 1.53
-
Uroporphyrin Inmol/g≤ 5.0
-
Uroporphyrin IIInmol/gAdult: ≤1µg/g x 1.20
-
Heptacarboxylic Acid - Fecesnmol/g≤1
-
Hexacarboxylic Acidnmol/gAdult: ≤1
-
Pentacarboxylic Acidnmol/gAdult: ≤1
-
Protoporphyrinnmol/gAdult: ≤38
Porphyrin reference values are not available for individuals 17 y and younger.
Referral Location
Canada
Interface & Setup
HL7 Interface Codes
| Order Code | Result Name | Result Codes | Units |
|---|---|---|---|
| PORPHQ F | Uroporphyrin I Fecal | 66220 | nmol/g |
| Uroporphyrin III Fecal | 20347 | nmol/g | |
| Heptacarboxylic Acid Porph Fecal | 20352 | nmol/g | |
| Hexacarboxylic Acid Porph Fecal | 20353 | nmol/g | |
| Pentacarboxylic Acid Porph Fecal | 20354 | nmol/g | |
| Coproporphyrin I Fecal | 20342 | nmol/g | |
| Coproporphyrin III Fecal | 20343 | nmol/g | |
| Copro III : Copro I Fecal | 62136 | Ratio | |
| Protoporphyrin Fecal | 20358 | nmol/g | |
| Porphyrin Interpretation Fecal | 20359 |
Test Version
Last Updated
2025-09-03