Allina Health Laboratory a part of Abbott Northwestern Hospital



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Test Name:Arsenic/creatinine, with reflex, random urine
Test Number:994
Collect:6 mL random urine
Minimum Volume:3 mL random urine
Container:Mayo Screw Cap Transfer Vial
Transport/Stability:Refrigerated (preferred) - 28 days
Ambient - 72 hours
Frozen - 28 days
Alternate Names:MSO
Performing Lab:Mayo Clinic Laboratories (ARSCR): R-NX
Days Set Up:Mo - Fr
Expected TAT:1 - 3 days
Ref. Ranges:0 - 17 years: not established
≥ 18 years: <24 mcg/g creatinine
Processing Details:
Testing algorithm:
If arsenic concentration is 35 mcg/L or greater, then fractionation will be performed at an additional charge.

Patient preparation
  • Patient should not eat seafood for a 48 hour period prior to the start of collection.
  • High concentrations of gadoliinium 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.
Consumption of seafood before collection of a urine specimen for arsenic testing is likely to result in a report of an elevated concentration of arsenic found in the urine, which can be clinically misleading.
Method:Inductively coupled plasma-mass spectrometry (ICP-MS) and
Enzymatic colorimetric assay
CPT Codes:82175
Date Created:05/18/2018
Revised Date:08/01/2019