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Test ID ALUCR Aluminum/Creatinine Ratio, Random, Urine

Ordering Guidance

The recommended test for routine aluminum screening is AL / Aluminum, Serum


For monitoring aluminum exposure or metallic prosthetic implant wear, the preferred test is ALU / Aluminum, 24 Hour, Urine.

Specimen Required

Patient Preparation: High concentrations of gadolinium and iodine are known to interfere with most metal tests. If either gadolinium- or iodine-containing contrast media has been administered, a specimen should not be collected for 96 hours.

Supplies: Urine Tubes, 10 mL (T068)

Collection Container/Tube: Clean, plastic urine collection container

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 Metals Analysis Specimen Collection and Transport for complete instructions.

Useful For

Monitoring aluminum exposure when a 24-hour urine cannot be collected


Monitoring metallic prosthetic implant wear when a 24-hour urine cannot be collected


This test is not an acceptable substitute for serum aluminum measurements and is not recommended for routine aluminum screening.

Profile Information

Test ID Reporting Name Available Separately Always Performed
ALCU Aluminum/Creat Ratio, U No Yes
CRETR Creatinine, Random, U No Yes

Method Name

ALCU: Inductively Coupled Plasma Mass Spectrometry (ICP-MS)

CRETR: Enzymatic Colorimetric Assay

Reporting Name

Aluminum/Creat Ratio, Random, U

Specimen Type


Specimen Minimum Volume

0.7 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Refrigerated (preferred) 28 days
  Frozen  28 days
  Ambient  14 days

Reference Values


0-17 years: Not established

≥18 years: <14 mcg/g creatinine



16-326 mg/dL

Reference values have not been established for patients younger than 18 years of age.

Day(s) Performed


Report Available

2 to 8 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

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 US Food and Drug Administration.

CPT Code Information



LOINC Code Information

Test ID Test Order Name Order LOINC Value
ALUCR Aluminum/Creat Ratio, Random, U 13470-0


Result ID Test Result Name Result LOINC Value
CRETR Creatinine, Random, U 2161-8
610839 Aluminum/Creat Ratio, U 13470-0