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Citric Acid, 24-Hour Urine (with Creatinine)
10 mL 24-hour urine collected in a 24-hour urine container
Please submit a 10 mL aliquot of a 24-hour collection. Collect urine without preservative. Refrigerate during and after collection.
Do not include first morning specimen; collect all subsequent voidings. The last sample collected should be the first morning specimen voided the following morning at the same time as the previous mornings first voiding. Record 24-hour urine volume on test request form and urine vial. Please aliquot unpreserved specimen prior to any addition of acid.
Refrigerated (cold packs)
Room temperature: 8 hours
Refrigerated: 30 days
Frozen: 60 days
Received room temperature • Acidified urine
Spectrophotometry (SP) • Enzymatic
Quest Diagnostics Nichols Institute
33608 Ortega Highway
San Juan Capistrano, CA 92690-6130
Set up: Mon-Fri; Report available: 3-6 days
Requires accurate 24-hour urine collection.
|Citric Acid, 24-Hour Urine||100-1300||mg/24 h|
Citric Acid, 24-Hour Urine
Creatinine, 24-Hour Urine
|3-8 Years||0.11-0.68||g/24 h|
|9-12 Years||0.17-1.41||g/24 h|
|13-17 Years||0.29-1.87||g/24 h|
Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.
(The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.)
* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.