Looking to order a test?
We’ve provided helpful links to make ordering easy.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
Visit our provider FAQ and learn about common questions to ordering tests.
Evaluate electrolyte balance
<1 year: 2.6 - 5.5 mmol/L, 1-11 years: 3.3 - 5.0 mmol/L, 12-150 years: 3.5 - 5.0 mmol/L
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Collect specimen in a green top heparin tube. Grossly hemolyzed samples are unacceptable for analysis.
Collect specimen in green top heparin tube. Centrifuge within 4 hours of collection, aliquot plasma into a plastic vial and refrigerate. If specimen cannot be centrifuged at client site, please arrange for delivery to MLabs within 3 hours of specimen collection. Grossly hemolyzed samples are unacceptable for analysis.