Test Overview
Test Methodology

Inductively Coupled Plasma-Mass Spectrometry (ICP-MS)

Test Usage

Detecting toxic thallium exposure.

Reference Range *

Blood: 0 - 1 ng/mL; Urine: Less than 10 mcg/specimen (24 hr collection).

Test Details
Days Set Up
Monday - Saturday
Analytic Time

2 - 4 days

Soft Order Code
MiChart Code
Thallium, Urine
Reference Laboratory
Mayo 8149 Blood, Mayo 8603 Urine
Special Testing
Specimen Requirements
Collection Instructions

Blood: Collect blood in 7 mL royal blue top (metal free) tube with EDTA (K2). Refrigerate intact specimen. Heparinized specimens are unacceptable. Urine: Collect 24 hour urine in a clean, plastic container with no metal cap or glued insert and no preservative. Aliquot urine into a clean, plastic container with no metal cap or glued insert and refrigerate within 4 hours of completion of collection. Record 24 hour urine volume and collection dates/times on the request form. Collection must take place prior to or 96 hours after administering gadolinium-containing contrast media.

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.
Normal Volume
Blood: 7 mL whole blood. Urine: 10 mL aliquot of 24 hour urine collection.
Minimum Volume
Blood: 0.3 mL whole blood. Urine: 1 mL aliquot of 24 hour urine collection.
Additional Information

Thallium is a by-product of lead smelting and is found in some depilatories and rodenticides. Thallium is rapidly absorbed via ingestion, inhalation, skin contact, and through mucous membranes. Test sent to Mayo Medical Laboratories.

CPT Code
83789 each specimen
Fee Code
32112 TL-S, 32113 TL-U
NY State Approved