Arsenic, 24-Hour Urine
Mayo: ASU24, EPIC: LAB5946, Beaker:
- Please refer to the Specimen Collection Manual for instructions on 24-Hour Urine Collection:
Patient should not eat seafood for a 48-hour period prior to start of collection.
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.
Specimen Collection Criteria
Collect (preferred specimen): 24 hour urine sample with no preservative.
Keep 24 hour urine specimen iced or refrigerated during collection.
- Include start and end dates and times for the collection period on the specimen container.
Urine Preservative Options
6N Hydrochloric Acid
Boric Acid (10g)
50% Acetic Acid
Physician Office/Draw Specimen Preparation
Maintain specimens refrigerated (2-8°C or 36-46°F) prior to transport.
Preparation for Courier Transport
Transport: Entire 24-hour urine collection, refrigerated (2-8°C or 36-46°F).
Specimens not collected and processed as indicated.
Measure total volume of 24-hour urine specimen. Record total volume and collection start and end dates and times in the LIS system. Aliquot 8.0 mL from the well-mixed 24-hour urine collection into a metal-free transport tube. (Minimum: 3.0 mL)
Specimen Stability for Testing:
Room Temperature (20-26°C or 68-78.8°F): 72 hours
Refrigerated (2-8°C or 36-46°F): 28 days
Frozen (-20°C/-4°F or below): 28 days
Specimen Storage in Department Prior to Disposal:
Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.
Sent to Mayo Clinic Laboratories in Rochester, MN.
Monday – Saturday
Results available in 2-5 days.
Quantitative Inductively Coupled Plasma/Mass Spectrometry.
LOINC: 5583-0, 5587-1, Inorganic 12481-8, Organic 53778-7, Total 5586-3
Send Outs Laboratory – RO
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