Chloride, 24 Hour, Urine
Use
Indication of fluid balance and acid‑base homeostasis using a 24‑hour urine collection; chloride is involved in maintaining osmotic pressure, hydration, and electric neutrality. Under normal conditions urine chloride reflects intake unless certain physiological perturbations (e.g., volume depletion or metabolic alkalosis) alter excretion patterns ([mayocliniclabs.com](https://www.mayocliniclabs.com/test-catalog/overview/614058?utm_source=openai)).
Special Instructions
Urine Preservatives‑Collection and Transportation for 24‑Hour Urine Specimens is relevant. 24‑Hour volume (in milliliters) is required ([mml.testcatalog.org](https://mml.testcatalog.org/show/CLU?utm_source=openai)).
Limitations
High urine levels of other halide ions (e.g., bromide, fluoride, iodide) may lead to falsely elevated readings on the chloride ion‑selective electrode ([mayocliniclabs.com](https://www.mayocliniclabs.com/test-catalog/overview/614058?utm_source=openai)).
New York Approved
Methodology
Automated Analyzer (Clinical Chemistry)
Biomarkers
LOINC Codes
- 43128-8
- 2079-2
- 13362-9
- 3167-4
Result Turnaround Time
Not provided.
Related Documents
For more information, please review the documents below
Specimen
Urine
Volume
4 mL
Minimum Volume
1 mL
Container
24‑Hour graduated urine container (no metal cap or glued insert); Sarstedt 5 mL Aliquot Tube (T914) for submission
Collection Instructions
Collect urine for 24 hours; refrigerate specimen within 4 hours of completion of collection
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 7 days |
| Refrigerated | 14 days |
| Frozen | 30 days |