Phosphate (Urine)
Clinical Biochemistry
Sample and container requirements
Plain 24 hr Urine
Minimum volume required
Special requirements
Acidify urine in the laboratory (24hr urine acidified by adding 400 uL of 3M HCL)
Patient preparation
None
Sample viability
Turnaround time
This assay is run daily Monday - Friday. Turnaround time is normally less than 24 hours
Reference range
15 – 50 mmol/24hr (Source: Pathology Harmony Recommendations)
Clinical guidance
Phosphate is important for bone metabolism. Most of the body's phosphate (85%) is located in the skeletal system, where it combines with calcium to give bones their structure. It also plays an important role in the formation of key nucleic acids, such as DNA, and in the process of generating energy from food (metabolism). Please refer to LabTestsOnlineUK to learn more about phosphate. https://labtestsonline.org.uk/tests/phosphate
Notes
Images to go here
This information was last updated on 19 August 2026