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Test ID: PQNRU    
Porphyrins, Quantitative, Random, Urine

Specimen Type Describes the specimen type needed for testing


Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.

Container/Tube: Amber, 60-mL urine bottle (Supply T596)

Specimen Volume: 20-50 mL

Collection Instructions:

1. Patient should abstain from alcohol for 24 hours prior to collection.

2. Collect a random urine specimen.

3. Protect specimen from light.

Additional Information: Include a list of medications the patient is currently taking.

Forms: If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:

Biochemical Genetics Request Form (Supply T439)

Neurology Test Request Form (T732) (

Specimen Minimum Volume Defines the amount of specimen required to perform an assay once, including instrument and container dead space. Submitting the minimum specimen volume makes it impossible to repeat the test or perform confirmatory or perform reflex testing. In some situations, a minimum specimen volume may result in a QNS (quantity not sufficient) result, requiring a second specimen to be collected.

15 mL

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected








Specimen not protected from light, pH <5.0


Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperature(s) are also included.

Specimen TypeTemperatureTime
UrineFrozen72 hours