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HelpTest Code ZNU Zinc, 24 Hour, Urine
Ordering Guidance
The use of blood testing is recommended for children younger than 10 years. Order ZN_S / Zinc, Serum.
Necessary Information
24-Hour volume (in milliliters) is required.
Specimen Required
Patient Preparation: High concentrations of barium are known to interfere with this test. If barium-containing contrast media has been administered, the specimen should not be collected for at least 96 hours.
Supplies: Urine Tubes, 10 mL (T068)
Collection Container/Tube: Clean, plastic urine collection container with no metal cap or glued insert
Submission Container/Tube: Plastic urine tube or clean, plastic aliquot container with no metal cap or glued insert
Specimen Volume: 10 mL
Collection Instructions:
1. Collect urine for 24 hours.
2. Refrigerate specimen within 4 hours of completion of 24-hour collection.
3. See Metals Analysis Specimen Collection and Transport for complete instructions.
Additional Information: See Urine Preservatives-Collection and Transportation for 24-Hour Urine Specimens for multiple collections.
CMH COLLECTION: 24 Hour urine collection in a urine jug
Specimen Minimum Volume
0.4 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Urine | Refrigerated (preferred) | 28 days | |
| Ambient | 28 days | ||
| Frozen | 28 days |
Useful For
Identifying the cause of abnormal serum zinc concentrations using a 24-hour urine specimen
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Day(s) Performed
Monday, Thursday
Report Available
2 to 5 daysReporting Name
Zinc, 24 Hr, UReference Values
0-17 years: Not established
≥18 years: 109-1,476 mcg/24 h
Method Name
Triple-Quadrupole Inductively-Coupled Plasma Mass Spectrometry (ICP-MS/MS)
Performing Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
84630