Test Details



Ordering Code


CPT-4 Code(s)


Specimen Information

Patient Preparation

Patients should be encouraged to discontinue nutritional supplements, vitamins, minerals, and non-essential over-the-counter medications. High concentrations of iodine or gadolinium may interfere with elemental testing. Collection from patients receiving iodinated or gadolinium-based contrast media must be avoided for a minimum of 72 hours post-exposure. Collection from patients with impaired kidney function should be avoided for a minimum of 14 days post contrast media exposure.


24 hour urine, refrigerate during collection.

Specimen Preparation

Refrigerate during collection. Mix well, and send 8.0 mL urine refrigerated in blue-capped ARUP metal-free screw capped plastic vial. Please contact laboratory for metal-free screw capped plastic vials. Specimens in other containers will be rejected.

Alternate Specimen

Random urine

Minimum Volume

1.0 mL

Rejection Criteria

Acid preserved urine, urine collected within 48 hours of iodinated or gadolinium-based contrast media. Specimens contaminated with blood or fecal material.


Room temperature: 7 days
Refrigerated: 14 days
Frozen: 1 year


Quantitative Inductively Coupled Plasma - Mass Spectrometry

Reference Range

Zinc, urine: 15-120 µg/dL
Zinc, urine (24-hour): 150-1200 µg/d
Zinc per gram of creatinine:
No reference interval (µg/g crt)
Creatinine, urine - per 24th:
Age Male Female
3-8 years 140-700 mg/d 140-700 mg/d
9-12 years 300-1300 mg/d 300-1300 mg/d
13-17 years 500-2300 mg/d 400-1600 mg/d
18-50 years 1000-2500 mg/d 700-1600 md/d
51-80 years 800-2100 mg/d 500-1400 mg/d
≥81 600-2000 mg/d 400-1300 mg/dd

Performing Laboratory