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Laboratory Medicine

Test catalogue

Calcium, 24hrs Urine

Test Name

Calcium, 24hrs Urine

Plain 24 bottle Specimen Type / Requirements

Container Type = 24 hour plain container bottle

Minimum Volume = 5mL urine from mixed urine collection

Specimen Handling

Collection Instructions: 24h urine collected in metal-free container without preservative and kept refrigerated or on ice during collection. Ensure collection bottle is labelled correctly. Keep the collected urine refrigerated if possible and return to lab ASAP.

Write your "start" and "end" date and time of collection on the collection label or requisition. Avoid mineral supplements for 5 days.

Laboratory Staff Instructions: Adjust pH to 1.5 – 2.0 with 6 N HCl before removing and aliquot for storage and analysis. Aliqout 3mL from mixed urine collection and Centrifuge.

Stability: Stable for 48 h at room temperature, refrigerated 4 days and for 3 weeks at -15 to -20°C.

Transportation: Transport at room temperature ASAP. Send sample as soon as possible.

Sample Rejection Criteria: Unlabeled, leaking or samples of non sufficient quantity.

Required Documentation

Turnaround Time (TAT)

1 day

Test Utilization

Reference Value

0.0 – 6.20 mmol/d

Test Code




Testing Location


Other Information

Last Updated: February 24, 2020