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HelpTest Code ASU24 Arsenic with Reflex, 24 Hour, Urine
Reporting Name
Arsenic w/Reflex, 24 Hr, UUseful For
Preferred screening test for detection of arsenic exposure using 24-hour urine specimens
Method Name
Triple-Quadrupole Inductively Coupled Plasma Mass Spectrometry (ICP-MS/MS)
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
UrineNecessary 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 potentially interfere with most inductively coupled plasma mass spectrometry-based 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.
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Specimen Minimum Volume
3 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| 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
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 (h) | 13362-9 |
| VL14 | Volume (mL) | 3167-4 |
| 92214 | Total Arsenic Concentration | 21074-0 |
Secondary ID
48537Reflex Tests
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| SPASU | Arsenic Speciation, 24 Hr, U | Yes | No |
Testing Algorithm
If total arsenic concentration is 10 mcg/L or greater, then speciation will be performed at an additional charge.