Zinc, 24-Hour Urine
Test Codes
EPIC: LAB6857, Beaker: XZINU, Mayo: ZNU
Department
Send Outs
Instructions
- Please refer to the Specimen Collection Manual for instructions on 24 Hour Urine Collection:
High concentrations of barium are known to interfere with this test. If barium-containing contrast media has been administered, a specimen should not be collected for 96 hours.
- The use of blood testing is recommended for children younger than 10 years of age.
Specimen Collection Criteria
Collect (preferred specimen): 24-hour urine sample with no preservative.
Keep 24 hour urine specimen iced or refrigerated during collection.
- Include start and end dates and times for the collection period on the specimen container.
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Urine Preservative Options
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No Preservative
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6N Hydrochloric Acid
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Boric Acid (10g)
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Sodium Carbonate
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50% Acetic Acid
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Acceptable
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Acceptable
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Unacceptable
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Unacceptable
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Acceptable
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Physician Office/Draw Specimen Preparation
Maintain specimens refrigerated (2-8°C or 36-46°F) prior to transport.
Preparation for Courier Transport
Transport: Entire 24-hour urine collection, refrigerated (2-8°C or 36-46°F).
Rejection Criteria
Random urine specimens.
Specimens not collected and processed as indicated.
In-Lab Processing
Measure total volume of 24-hour urine specimen. Record total volume and collection start and end dates and times in the LIS system. Aliquot 8.0 mL from the well-mixed 24-hour urine collection into a metal-free transport tube. (Minimum: 0.4 mL)
Storage
Specimen Stability for Testing:
Room Temperature (20-26°C or 68-78.8°F): 28 days
Refrigerated (2-8°C or 36-46°F): 28 days
Frozen (-20°C/-4°F or below): 28 days
Specimen Storage in Department Prior to Disposal:
Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.
Laboratory
Sent to Mayo Clinic Laboratories in Rochester, MN.
Performed
Monday, Thursday.
Results available in 2-5 days.
Reference Range
By report.
Test Methodology
Quantitative Inductively Coupled Plasma/Mass Spectrometry.
Interpretation
Zinc is predominantly eliminated in the feces. Elevated urine zinc may suggest excessive zinc supplementation but should be interpreted with a corresponding serum zinc concentration.
CPT Codes
84630
LOINC: 5763-8
Contacts
Send Outs Laboratory – RO
248-551-9045
Name: Send Outs Laboratory – RO
Location:
Phone: 248-551-9045
Last Updated
9/14/2023
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