Specimen Required
Patient Preparation: Patients should be encouraged to discontinue vitamins, nutritional supplements, and nonessential over-the-counter medications prior to specimen collection, and avoid shellfish and seafood for 48-72 hours. High concentrations of iodine may interfere with elemental testing. Abstinence from iodine-containing medications or contrast agents is recommended at least 1 month before sample collection.
Collection of urine specimens from patients receiving iodinated or gadolinium based contrast media should be avoided for a minimum of 72 hours post-exposure. Collection from patients with impaired kidney function should be avoided for a minimum of 14 days post-contrast media exposure.
Collect 24 hour urine, refrigerate during collection. Mix well and send 8.0 mL urine (1.0 mL minimum) in a blue-capped ARUP metal-free screw-capped plastic urine container. Please contact lab for metal-free screw-capped plastic vials. Specimens in other containers will be rejected. Record total volume on test requisition and specimen label.

Alternate Specimen
Random urine

Rejection Criteria
Acid preserved urines. Specimens contaminated with blood or fecal material. Specimens transported in non-trace element free transport tube. Urine collected wihtin 72 hours after administration of iodinated or gadolinium-based contrast media.

Inductively Coupled Plasma/Mass Spectrometry

Room Temperature: 7 days; Refrigerated: 14 days; Frozen: 1 year

Reference Range
Mercury, Urine - per volume:   0.0-5.0 ug/L  
Mercury, Urine - per 24h:   0.0-23.0 ug/d  
Mercury, Urine -ratio to CRT:   0.0-20.0 ug/g CRT  
Creatinine, Urine - per 24h:   By report  


Turnaround Time2-5 days
Test CodeUMERA
CPT-4 Code (s)
Hours collected   30211-7  
Total volume   19153-6  
Mercury, urine ratio to CRT   13465-0  
Creatinine urine/24 hour   2162-6  
Creatinine urine/volume   2161-8  
Mercury urine/volume   5689-5  
Mercury urine/24 hour   6693-6