Sulfate, 24 Hour, Urine
Use
Urinary sulfate reflects dietary intake of sulfur-containing amino acids (e.g., methionine, cysteine) and is used as an index of nutritional protein intake. It also is used in calculating urinary supersaturation of various crystals or stones, useful for evaluating kidney stone risk.
Special Instructions
Renal Diagnostics Test Request (T830) form should be completed if not ordering electronically. See “Urine Preservatives‑Collection and Transportation for 24‑Hour Urine Specimens” for multiple collection details. 24‑hour volume (in milliliters) is required.
Limitations
Specimens with pH >8 indicate bacterial contamination and will be cancelled. pH should be between 4.5 and 8; do not attempt to adjust pH as this may adversely affect results.
New York Approved
Methodology
Automated Analyzer (Other)
Biomarkers
LOINC Codes
- 26889-6
- 26889-6
- 13362-9
- 3167-4
- 12920-5
Result Turnaround Time
1-3 days
Related Documents
For more information, please review the documents below
Specimen
Urine
Volume
4 mL
Minimum Volume
1 mL
Container
Plastic, 5‑mL urine tube (Sarstedt 5 mL Aliquot Tube T914)
Collection Instructions
Collect urine for 24 hours. If no preservative, keep refrigerated during and after collection. If preservative not added before collection, keep refrigerated until preservative added; add preservative within 4 hours after collection. Specimen pH should be 4.5‑8. Do not adjust pH.
Storage Instructions
Refrigerate preferred; frozen acceptable
Causes for Rejection
Specimen pH >8 indicating bacterial contamination
Stability Requirements
| Temperature | Period |
|---|---|
| Refrigerated | 14 days |
| Frozen | 14 days |