Days Set Up
Monday - Friday
Analytic Time

1 - 4 days

MiChart Code
Chromium, Urine
Soft Order Code

Test Updated:


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Find a Requisition

All specimens should be accompanied by a requisition.

Submitting Specimens

Learn about how to properly label and where to ship specimens.

Order Kits and Supplies

MLabs provides all the supplies necessary for the collection of specimens.

Test FAQ

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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.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

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.

24-hour Urine Jug
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.

Billing Information

CPT Code
Pro Fee Code
Insurance Auth Info
Z53-9 Serum

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.