Laboratory Medicine

Test catalogue

Oxalate, 24 hour urine
Test Name Oxalate, 24 hour urine
Specimen Type / Requirements Container Type = 24 hour container with 25 mL 6N HCL. Minimum Testing Volume = 5mL urine from mixed urine Collection
Specimen Handling Collection Instructions: 24 hour urine plain container. Vitamin C (ascorbic acid) quickly degrades to oxalate in non acidified urine. Patients should consider refraining from vitamin C supliments for 24 hours prior to urine collection. Laboratory Staff Instructions An aliquot should be acidified with 6N HCl and stored refrigerated or frozen until analysis Stability: Stable for 7 days at 2-8°C and frozen for more than 7 days if in acidified. Rejection Criteria: Leaking container or inappropriate container type.. Transportation: Send sample to core lab as soon as possible.
Required Documentation
Turnaround Time (TAT) 14 days	Test Utilization Routine
Reference Value 190 - 480 umol/d
Test Code LAB421	Methodology Enzymatic
Testing Location SMH-Biochemistry	Other Information Last Updated: July 18, 2025

Oxalate, 24 hour urine

Test Name

Oxalate, 24 hour urine

Specimen Type / Requirements

Container Type = 24 hour container with 25 mL 6N HCL.

Minimum Testing Volume = 5mL urine from mixed urine Collection

Specimen Handling

Collection Instructions: 24 hour urine plain container. Vitamin C (ascorbic acid) quickly degrades to oxalate in non acidified urine. Patients should consider refraining from vitamin C supliments for 24 hours prior to urine collection.

Laboratory Staff Instructions An aliquot should be acidified with 6N HCl and stored refrigerated or frozen until analysis

Stability: Stable for 7 days at 2-8°C and frozen for more than 7 days if in acidified.

Rejection Criteria: Leaking container or inappropriate container type..

Transportation: Send sample to core lab as soon as possible.

Required Documentation

Turnaround Time (TAT)

14 days

Test Utilization

Routine

Reference Value

190 - 480 umol/d

Test Code

LAB421

Methodology

Enzymatic

Testing Location

SMH-Biochemistry

Other Information

Last Updated: July 18, 2025