Zinc, 24-Hour Urine

Test Codes

Order Reference Lab Miscellaneous Send Out: EPIC: LAB848, Beaker: Ref. Lab Misc., Quest: 946

Department

Send Outs

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.

Physician Office/Draw Specimen Preparation

Maintain specimens refrigerated at (2-8°C or 36-46°F) prior to transport.

Preparation for Courier Transport

Transport: Entire 24-hour urine collection, at room temperature (20-26°C or 68-78.8°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 7.0 mL from the well-mixed 24-hour urine collection into a metal-free transport tube. (Minimum: 3.0 mL)

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 5 days
Refrigerated (2-8°C or 36-46°F): 14 days
Frozen (-20°C/-4°F or below): 30 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 Quest Diagnostics, Wood Dale, IL.

Performed

Tuesday – Saturday.
Results available in 3-5 days. 

Reference Range

100 - 1200 mcg/24 h

Test Methodology

Inductively Coupled Plasma/Mass Spectrometry (ICP/MS)

Clinical Utility

Zinc, 24-Hour Urine – Zinc is an essential element involved in a myriad of enzyme systems including wound healing, immune function, and fetal development. Zinc measurements are used to detect and monitor industrial, dietary, and accidental exposure to zinc. Also, zinc measurements may be used to evaluate health and monitor response to treatment.

CPT Codes

84630
LOINC:  5763-8

Contacts

Last Updated

3/11/2026