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Laboratory Test Directory

Arsenic, Urine with Reflex to Fractionated


Name Method Department Units
Arsenic, Urine Inductively coupled plasma/ mass spectrometry
Quantitative High Performance Liquid Chromatography
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Specimen Requirements

Urine, 24 hours, Urine - Random

Container Type Container Size Specimen Volume

24 hour urine container

N/A 8 mL

Sterile container

N/A 8 mL

Room temperature - 1 week(s)
Refrigerated - 2 week(s)
Frozen - 12 month(s)

Specimen Preparation

  • Refrigerate during collection
  • Transport to laboratory as soon as possible
  • Record total volume and collection time interval on transport tube and on test request form
  • Transfer an aliquot of urine from a well-mixed collection to an ARUP Trace Element-Free Transport Tube

Reasons for Rejection

  • Collection in metal container
  • Collection in glass container
  • Urine collected within 48 hours after administration of gadolimium (Gd) containing contrast media (MRI studies)
  • Use of urine preservative


Diet, medication, and nutritional supplements may introduce interfering substances. Patients should be encouraged to discontinue nutritional supplements, vitamins, minerals, nonessential over-the-counter medications (upon the advice of their physician), and avoid shellfish and seafood for 48 to 72 hours. Abstinence from iodine-containing medications or contrast agents for at least 1 month prior to collecting specimens for elemental testing is recommended. Specimen must be collected in a plastic container and should be refrigerated during collection. For specimens with a total arsenic concentration between 35 and 2000 ug/L, fractionation is automatically performed to determine the proportions of inorganic, methylated and organic species. A completed demographic requisition must accompany specimens.


Lab Form

CPT Code

  • 82175