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Ammonium, 24-Hour Urine
Ordering Recommendation
Use to determine the cause of acidosis. May aid in diagnosing and monitoring kidney stones. A 24-hour urine collection of 300 mL or greater is required. To submit a random urine or 24-hour collection with a total volume of less than 300 mL, contact ARUP Client Services for further assistance.
New York DOH Approval Status
Specimen Required
24-hour urine. Refrigerate during collection or add 5 mL of diazolidinyl urea (Germall) as preservative at start of collection.
From a well-mixed 24-hour collection, transfer 4 mL urine to an ARUP standard transport tube. (Min: 1 mL). Collection duration and urine volume must be provided for testing.Test is not performed at ARUP; separate specimens must be submitted when multiple tests are ordered.
Refrigerated. Also acceptable: Frozen.
Specimens with pH >8 may indicate bacterial contamination and testing will be canceled. Do not attempt to adjust pH as it will adversely affect results. Collection duration and urine volume must be provided for testing. Total collection volume must be greater than 300 mL.
Ambient: 72 hours; Refrigerated: 2 weeks; Frozen: 2 weeks
Methodology
Quantitative Enzymatic Assay
Performed
Varies
Reported
3-5 days
Reference Interval
By Report
Interpretive Data
Performed by non-ARUP Laboratory
Note
Reference values have not been established for patients less than 18 years and greater than 77 years of age. The presence of sulfasalazine, sulfapyridine, or temozolomide may lead to false results.
Hotline History
CPT Codes
82140
Components
| Component Test Code* | Component Chart Name | LOINC |
|---|---|---|
| 3004263 | Ammonium, 24 Hour Urine | 25308-8 |
| 3004264 | Ammonium Collection Duration | 13362-9 |
| 3004265 | Ammonium Urine Volume | 3167-4 |
Aliases
- Ammonia
Mayo Clinic Laboratories
