Test directory: Oxalate, Quant., 24Hr Urine

Ordering Code 307
Test Name Oxalate, Quant., 24Hr Urine
Alias Oxalic Acid
Preferred Specimen Urine, 24 Hour
Preferred Container 24 Hour Urine Container
Optimum Volume 15 mL
Collection Instructions Keep refrigerated during collection. Record entire 24 Hr
Vol on container & requisition. Patient should refrain from taking excessive amounts of Ascrobic acid, Vitamin C supplements, Vitamin C or Oxalate rich foods (ie: spinach, coffee, tea, chocolate, rhubarb) for at least 48 hours prior to and during the collection. If possible and available, then add 25 mL of 6N HCl prior to collection. If unable to add preservative, then urine MUST be kept refrigerated during collection.
Handling Instructions Specimen volume required. If preservative (6N HCl) not added prior to collection, then ADJUST and maintain a pH below 3. Adjust pH within 24 hours of collection.
Transport Requirements Oahu: Refrigerated
Airline: Refrigerated
Specimen Stability Ambient: 7 Days
Refrigerated: 7 Days
Frozen: 24 Days
Rejection Criteria Specimen older than stability limits, Raw specimen not pH'd to < 3 within 24 hours of collection
Avail. Stat NO
Analytic Time 10 Days
Methodology Spectrophotometry
Reference Lab  Quest Diagnostic Lab-NI

Reference range(s)

The reference ranges listed below are valid on this date of June 29, 2025.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
Oxalate, 24Hr ALL See report.