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Oxalic Acid 24 hr Urine

Order Code U007
Turnaround Time 24-48 hours
Specimen Requirements
Specimen Source
Transport Container
(Specimen Container)

Plastic urine container

Preferred Specimens
10 mL aliquot from a 24-hour urine collection
Minimum Volume (uL)
2 mL
Collection Instructions
(Transport Temperature)
Transport at Room Temperature
Specimen Stability
Temperature Period
Room temperature 7 days
Refrigerated 7 days
Frozen 24 days
Special Instructions

Collect urine with 25 mL of 6N HCl to maintain a pH below 3. Refrigerate during and after collection. Patient should refrain from taking excessive amounts of ascorbic acid or oxalate-rich foods (i.e., spinach, coffee, tea, chocolate, rhubarb) for at least 48 hours prior to collection period

Test Details
Spectrophotometry (SP)
Reference Ranges

3.6 – 38.0 mg/24 h