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Test ID CROMU Chromium for Occupational Monitoring, Random, Urine

Useful For

Screening for occupational exposure

Method Name

CROM: Dynamic Reaction Cell-Inductively Coupled Plasma-Mass Spectometry (DRC-ICP-MS)

CDCR: Enzymatic Colorimetric Assay

Reporting Name

Chromium, Occupational Monitor, U

Specimen Type


Specimen Required

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

Collection Container/Tube: Clean, plastic urine collection container

Submission Container/Tube: Plastic, 5-mL tube (T465) or a clean, plastic aliquot container with no metal cap or glued insert

Specimen Volume: 5 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

2 mL

Specimen Stability Information

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

Reference Values

Chromium/creatinine ratio: <10.0 mcg/g creatinine

Day(s) and Time(s) Performed

Tuesday, Friday; Continuously

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

82495 Chromium, Concentration

82570 Creatinine Concentration

LOINC Code Information

Test ID Test Order Name Order LOINC Value
CROMU Chromium, Occupational Monitor, U 13464-3


Result ID Test Result Name Result LOINC Value
CDCR Creatinine Conc 2161-8
26570 Chromium, Random, U 5623-4
29512 Chromium/Creatinine Ratio 13464-3

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.

Profile Information

Test ID Reporting Name Available Separately Always Performed
CROM Chromium, Random, U No Yes
CDCR Creatinine Conc No Yes

NY State Approved