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St. John Health System
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Cobalt 24 Hour Urine

Order Name COBALT U
Test Number: 3809025
Revision Date 12/10/2022
Test Name Methodology LOINC Code
Cobalt 24 Hour Urine
Inductively-Coupled Plasma/Mass Spectrometry 21208-4 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 5.0 mL ( 1.5 mL) Urine, 24-hour Acid Washed, Trace Element Free 24 hour Urine Container Room Temperature
Instructions Specimen Type: Plastic urine container, no preservative
Specimen Storage: Maintain specimen at room temperature.
Specimen Collection: Sampling time is end of shift at end of work week. Metals with timing "end of shift at end of work week" (meaning four or five consecutive working days with exposure) are eliminated with half-lives longer than five hours. Such metals accumulate in the body during the work week; therefore, their timing is critical in relation to previous exposures. 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). Avoid contact with metal during collection. Screw the lid on securely.
Special Instructions: Do not use preservatives. Preservatives used for routine analysis may contain mercuric oxide (ie, Stabilur), which interferes with all metal testing. If both urinalysis and metal testing are ordered, please submit a separate urine specimen (containing no
Specimen Stability: Ambient: 14 days, Refrigerated : 14 days, Frozen: 14 days
GENERAL INFORMATION
Expected TAT 2-4 days  
Notes Labcorp Test Code: 071514
CPT Code(s) 82570, 83018
Service Provided By Labcorp Oklahoma, Inc.
Lab Section Reference Lab