Methodology
Spectrophotometry (SP)
Synonyms
Oxalate
Specimen Type
Urine
Performing Lab
Quest Diagnostics San Juan Capistrano
Epic ID
LAB01596
Lab Test Days
Tuesday-Saturday
Standard TAT
1-3 Days
Collection Information
Specimen Required
3-10 mL Second Void Urine
Container Type
Sterile Container
Collection Instructions
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 before the collection period. Refrigerated after collection.
Processing Information - Lab Use Only
Transport Temperature
Refrigerate-OK/Frozen-OK/Ambient-OK
Specimen Stability
Room Temp: 7 Days; Refrigerated: 7 Days; Frozen: 24 Days
Test Volume Required
10 mL 2nd Voided Urine
Minimum Test Volume
3 mL 2nd Voided Urine
Processing Instructions
Adjust pH to <3.0 with 6N HCl prior to aliquoting for testing. Please submit second morning voided specimen.
CPT Codes
82570, 83945
Revised
8/8/24
Initials
SA