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Test ID NBLD0111 Heavy Metals Screen, Random, Urine

Reporting Name

Heavy Metals Scrn, Random, U

Profile Information

Test ID Reporting Name Available Separately Always Performed
ASRU Arsenic, Random, U Yes Yes
PBRU Lead, Random, U Yes Yes
CDRU Cadmium, Random, U Yes Yes
HGRU Mercury, Random, U Yes Yes

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type


Specimen Required

Patient Preparation:

1. Patient should not eat seafood for a 48-hour period prior to start of collection.

2. High concentrations of gadolinium and iodine are known to interfere with most metals tests. If either gadolinium- or iodine-containing contrast media has been administered, a specimen should not be collected for 96 hours.

Collection Container/Tube: Clean, plastic urine collection container

Submission Container/Tube: Plastic, 5-mL tube (T465) or a clean, plastic aliquot container with no metal cap or glued insert

Specimen Volume: 2 mL

Collection Instructions:

1. Collect a random urine specimen.

2. See Trace Metals Analysis Specimen Collection and Transport in Special Instructions for complete instructions.

Specimen Minimum Volume

2 mL

Specimen Stability Information

Specimen Type Temperature Time
Urine Refrigerated (preferred) 7 days
  Frozen  7 days

Reference Values


0-35 mcg/L

Reference values apply to all ages.



0-4 mcg/L

Reference values apply to all ages.



0-15 years: not established

≥16 years: 0.0-1.3 mcg/L



0-15 years: not established

≥16 years: 0-9 mcg/L

Toxic concentration: >50 mcg/L

The concentration at which toxicity is expressed is widely variable between patients. 50 mcg/L is the lowest concentration at which toxicity is usually apparent.

Day(s) and Time(s) Performed

Monday through Friday; 3 p.m. - 9 p.m.; Saturday; 8 a.m. – 3 p.m./Continuously

Test Classification

See Individual Test IDs

CPT Code Information





LOINC Code Information

Test ID Test Order Name Order LOINC Value
HMSRU Heavy Metals Scrn, Random, U In Process


Result ID Test Result Name Result LOINC Value
89889 Arsenic, Random, U 5586-3
60156 Cadmium, Random, U 5611-9
60248 Mercury, Random, U 5689-5
60246 Lead, Random, U 5676-2

Analytic Time

1 day

Reject Due To









Method Name

Inductively Coupled Plasma-Mass Spectrometry (ICP-MS)

Testing Algorithm

See Porphyria (Acute) Testing Algorithm in Special Instructions.