Test Overview
Test Methodology

Dynamic Reaction Cell-Inductively Coupled-Mass Spectrometry

Test Usage

Useful for detecting occupational exposure to chromium.

Reference Range *

Serum: <0.3 ng/mL; Urine: <8.0 mcg/24 hours.

Test Details
Days Set Up
Monday - Friday
Analytic Time

1 - 4 days

Soft Order Code
MiChart Code
Chromium, Urine
Reference Laboratory
Mayo 8638 CR-S/Mayo 8593 CR-U
Special Testing
Specimen Requirements
Collection Instructions

Serum: Collect blood in a royal blue trace element tube, no preservative (serum). Allow specimen to clot for 30 minutes, centrifuge, and carefully pour serum into a metal-free container, avoiding transfer of the cellular components of blood. Do not insert a pipet into the serum to transfer and do not ream the specimen with a wooden stick to assist with the transfer. Refrigerate up to 48 hours or freeze for longer storage. 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 48 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
Serum: 1 ml serum. Urine: 10 ml aliquot of 24 hour urine collection.
Minimum Volume
Serum: 0.5 ml serum. Urine: 5 ml aliquot of 24 hour urine collection.
Additional Information

Test sent to Mayo Medical Laboratories.

CPT Code
Fee Code
32072 CR-S, 32073 CR-U
Z53-9 Serum
NY State Approved