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Zinc, Total

Test ID: 


CPT code:



Zn, Urine

Clinical Use:

Evaluate zinc exposure; evaluate low serum zinc levels; evaluate compliance in oral zinc therapy of Wilson disease. Low urine zinc levels in the presence of depressed serum zinc tends to confirm zinc deficiency.

Test Information:

Creatinine, urine; zinc, urine; zinc:creatinine ratio; zinc, urine (24-hour)

Specimen Type:

Urine (24-hour or random)

Requested Volume: 

5 mL

Minimum Volume: 

1.7 mL

Container Type: 

Plastic urine container, no preservative


Optional protocol: Instruct the patient to void at 8 AM and discard the specimen. Then collect all urine including the final specimen voided at the end of the 24-hour collection period (ie, 8 AM the next morning). Screw the lid on securely.

Storage Instructions:

Maintain specimen at room temperature.

Stability Requirements:



Room temperature

14 days


14 days


14 days

Freeze/thaw cycles

Stable x3


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