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Mercury, Random Urine
2011481
Ordering Recommendation

May be useful in the assessment of acute or chronic elemental or inorganic mercury exposure and/or in monitoring chelation therapy. For the assessment of acute exposure, Mercury, Whole Blood (0099305) is preferred.

Mnemonic
U MERCRAND
Methodology
Quantitative Inductively Coupled Plasma-Mass Spectrometry
Performed
Sun-Sat
Reported
1-4 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
Specimen Required
Patient Preparation
Diet, medication, and nutritional supplements may introduce interfering substances. Patients should be encouraged to discontinue nutritional supplements, vitamins, minerals, and non-essential over-the-counter medications (upon the advice of their physician). High concentrations of iodine may interfere with elemental testing. Abstinence from iodine-containing medications or contrast agents for at least 1 month prior to collecting specimens for elemental testing is recommended. 
Collect
Random urine. 
Specimen Preparation
Transfer an 8 mL aliquot from a well-mixed collection to ARUP Trace Element-Free Transport Tubes (ARUP supply #43116), available online through eSupply using ARUP Connect or contact ARUP Client Services at (800) 522-2787. (Min: 1 mL). 
Storage/Transport Temperature
Refrigerated. Also acceptable: Room temperature or frozen. 
Unacceptable Conditions
Urine collected within 48 hours after administration of a gadolinium (Gd) containing contrast media (may occur with MRI studies). Acid preserved urine. 
Remarks
 
Stability
Ambient: 1 week; Refrigerated: 2 weeks; Frozen: 1 year 
Reference Interval
ComponentsReference Interval
Mercury, Urine - per volume0-10 µg/L
Mercury, Urine - ratio to CRTLess than or equal to 35 µg/gCRT

Interpretive Data
Urinary mercury levels predominantly reflect acute or chronic elemental or inorganic mercury exposure. Urine concentrations in unexposed individuals are typically less than 10 µg/L. 24-hour urine concentrations of 30 to 100 µg/L may be associated with subclinical neuropsychiatric symptoms and tremors. Concentrations greater than 100 µg/L can be associated with overt neuropsychiatric disturbances and tremors. Urine mercury levels may be useful in monitoring chelation therapy.

Components
Component Test Code*Component Chart NameLOINC
0020207Creatinine, Urine - per volume2161-8
0025052Mercury, Urine - per volume5689-5
0025054Mercury, Urine - ratio to CRT13465-0
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Hg
  • HGU
  • Urine Hg
  • Urine mercury concentration