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Porphobilinogen, Quantitative - Urine

Source Urine
Mnemonic UPBGQTR
Specimen Requirements

10 mL random urine collection.  Minimum 2 mL required.

Random urine is the preferred sample. For other sample collections, consultation with a Clinical Biochemist is required.

Refrigerate immediately after collection.

Specimen Handling

Protect from light by wrapping entire container in foil. Specimens not protected from light will be rejected.

Sample may be refrigerated for up to 48 hours.  For longer storage, freeze at -20ºC.

Additional Information  
Testing Location Analytical Toxicology
Testing Frequency As requested
Alternate Name(s)
Reference Interval

Random Urine PBG

Range (umol/L)

Risk Association to Acute

Intermittent Porphyria

3 - 9

No Risk

10 - 88

Moderate Risk

89 – 176

High Risk

> 176

Highest Risk