Phosphate (Urine)

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Testing Laboratory

Auckland Te Toka Tumai | Auckland Hospital

Department

Chemical Pathology

Delphic Registration Code (Alpha Code)

UPO4

Test Code (Numeric Code)

3791

Laboratory Handling

Phlebotomy

1. 24 hr urine collected into acid bottle is the recommended sample for adults.
2. A spot urine in a plain container (for phosphate/creatinine ratio). Request for phosphate and creatinine.

Sample Stability

6 months at 2-8°C when acidified

Associated Tests

Synonyms

Urine PO4, Urine Phosphorus

Turnaround Time

3 hours

Specimen Type

  • 24hr Urine
  • Urine

Specimen Requirements

Tube/Container Type:

Preferred
  • Acidified 24hr Urine Container
Acceptable
  • BD Urine Tube (no additive)

Paediatric Specimen Requirements

Tube/Container Type:

Preferred
  • 24hr Urine Container
Acceptable
  • BD Urine Tube (no additive)

Additional Specimen Information

Laboratory Notes:
1. Urine Phosphate is stable in a non acidified sample for at least 48 hrs at room temperature from the time that the collection is completed.
2. If a specimen is likely to be analysed after this 48hrs, an acidified aliquot of the urine should be prepared as per the SOP.

Last updated: 07/08/2026