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HelpTest Code LAB1234618 Arsenic Speciation, Random, Urine
Specimen Required
Patient Preparation:
1. For the 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)
-Sarstedt Aliquot Tube 5 mL (T914)
Collection Container/Tube: Clean, plastic urine collection container
Submission Container/Tube: Plastic vial or a clean, plastic aliquot container with no metal cap or glued insert
Specimen Volume: 5 mL
Collection Instructions:
1. Collect a random urine specimen.
2. See Metals Analysis Specimen Collection and Transport for complete instructions.
Useful For
Diagnosing arsenic intoxication using random urine specimens
Testing Algorithm
Total arsenic will be performed first. If the total arsenic concentration is 10 mcg/L or greater, then speciation will be performed and reported. If total arsenic is below 10 mcg/L, total arsenic will be reported as less than 10 mcg/L and speciation will not be performed.
Special Instructions
Reporting Name
Arsenic Speciation, Random, 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 |
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Reference Values
TOXIC ARSENIC
<35 mcg/L
Reference values apply to all ages.
Arsenic Speciation Interpretive Information:
The toxic arsenic concentration represents the sum of the inorganic and methylated arsenic species. The reference value for toxic arsenic is <35 mcg/L. This value is based on the ACGIH Biological Exposure Index (BEI), which does not include the nontoxic organic arsenic.
Specimen Retention Time
14 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
82175
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| SPAS | Arsenic Speciation, Random, U | 54454-4 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 607692 | Inorganic Arsenic (Toxic) | 12481-8 |
| 607693 | Methylated Arsenic (Toxic) | 53779-5 |
| 607694 | Organic Arsenic (Non-Toxic) | 53778-7 |
| 609405 | Toxic Arsenic Concentration | 96250-6 |
| 607691 | Total Arsenic Concentration | 5586-3 |
Day(s) Performed
Monday through Friday