Test Code URZNR Zinc/Creatinine Ratio, Random, Urine
Reporting Name
Zinc/Creat Ratio, Random, UUseful For
Identifying the cause of abnormal serum zinc concentrations using a random urine specimen
Profile Information
Test ID | Reporting Name | Available Separately | Always Performed |
---|---|---|---|
ZNCR | Zinc/Creat Ratio, U | No | Yes |
CDCR | Creatinine Conc | No | Yes |
Performing Laboratory

Specimen Type
UrineSpecimen Required
Patient Preparation: High concentrations of barium are known to interfere with most metals tests. If barium-containing contrast media has been administered, a 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: 3 mL
Collection Instructions:
1. Collect a random urine specimen.
2. See Trace Metals Analysis Specimen Collection and Transport in Special Instructions for complete instructions.
Specimen Minimum Volume
0.7 mL
Specimen Stability Information
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
Urine | Refrigerated (preferred) | 28 days | |
Ambient | 28 days | ||
Frozen | 28 days |
Special Instructions
Reference Values
0-17 years: not established
≥18 years: 89-910 mcg/g Creatinine
Day(s) and Time(s) Performed
Monday; Continuously
Test Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.CPT Code Information
84630 Zinc Concentration
82570 Creatinine Concentration
LOINC Code Information
Test ID | Test Order Name | Order LOINC Value |
---|---|---|
ZNCRU | Zinc/Creat Ratio, Random, U | 13473-4 |
Result ID | Test Result Name | Result LOINC Value |
---|---|---|
CDCR | Creatinine Conc | 2161-8 |
32876 | Zinc/Creat Ratio, U | 13473-4 |
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability. |
Method Name
ZNCR: Inductively Coupled Plasma-Mass Spectrometry (ICP-MS)
CDCR: Enzymatic Colorimetric Assay