- Patient Preparation
- Royal blue (K2EDTA or Na2EDTA).
- Specimen Preparation
- Transport 7 mL whole blood in the original collection tube. (Min: 1.5 mL)
- Storage/Transport Temperature
- Room temperature. Also acceptable: Refrigerated.
- Unacceptable Conditions
- Heparin anticoagulant. Frozen specimens.
- Trace Elements requisition form may be required (ARUP form #32990).
- Mercury is volatile; concentration may reduce after seven or more days of storage. If the specimen is drawn and stored in the appropriate container, the arsenic and lead values do not change with time.
Blood mercury levels predominantly reflect recent exposure and are most useful in the diagnosis of acute poisoning as blood mercury concentrations rise sharply and fall quickly over several days after ingestion. Blood concentrations in unexposed individuals rarely exceed 20 µg/L. The provided reference interval relates to inorganic mercury concentrations. Dietary and non-occupational exposure to organic mercury forms may contribute to an elevated total mercury result. Clinical presentation after toxic exposure to organic mercury may include dysarthria, ataxia and constricted vision fields with mercury blood concentrations from 20 to 50 µg/L.
Potentially toxic ranges for blood arsenic: Greater than or equal to 600 µg/L.
Blood arsenic is for the detection of recent exposure only. Blood arsenic levels in healthy subjects vary considerably with exposure to arsenic in the diet and the environment. A 24-hour urine arsenic is useful for the detection of chronic exposure.
|Component Test Code*||Component Chart Name||LOINC|
|0020098||Lead, Blood (Venous)||5671-3|
- arsenic blood level
- lead blood level
- mercury blood level