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HelpTest Code ASU24 Arsenic with Reflex, 24 Hour, Urine
Necessary Information
24-Hour volume (in milliliters) is required.
Specimen Required
Patient Preparation:
1. For 48-hour period prior to start of collection, patient should not eat seafood.
2. 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 container with no metal cap or glued insert.
Submission Container/Tube: Plastic, 10-mL urine tube or clean, plastic aliquot container with no metal cap or glued insert.
Specimen Volume: 6 mL
Collection Instructions:
1. Collect urine for 24 hours.
2. Refrigerate specimen within 4 hours of completion of 24-hour collection.
3. See Metals Analysis Specimen Collection and Transport for complete instructions.
Additional Information: See Urine Preservatives-Collection and Transportation for 24-Hour Urine Specimens.
Useful For
Preferred screening test for detection of arsenic exposure using 24-hour urine specimens
Testing Algorithm
If total arsenic concentration is 10 mcg/L or greater, then speciation will be performed at an additional charge.
Special Instructions
Method Name
Triple-Quadrupole Inductively Coupled Plasma Mass Spectrometry (ICP-MS/MS)
Reporting Name
Arsenic w/Reflex, 24 Hr, USpecimen Type
UrineSpecimen Minimum Volume
3 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Urine | Refrigerated (preferred) | 28 days | |
| Frozen | 28 days | ||
| Ambient | 72 hours |
Reference Values
0-17 years: Not established
≥18 years: <35 mcg/24 h
Day(s) Performed
Monday through Friday
Report Available
1 to 3 daysPerforming 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. It has not been cleared or approved by the US Food and Drug Administration.CPT Code Information
82175
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| ASU24 | Arsenic w/Reflex, 24 Hr, U | 5587-1 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 48537 | Arsenic, 24 Hr, U | 5587-1 |
| TIME3 | Collection Duration | 13362-9 |
| VL14 | Urine Volume | 3167-4 |
| 92214 | Total Arsenic Concentration | 21074-0 |