Potassium, 24hr Urine

Test Overview

Test Methodology

Potentiometric (ISE)

Test Usage

Renal function test useful in disorders of aldosterone secretion. Evaluation of electrolyte balance.

Reference Range*

26 - 123 mEq/24 hrs (26-123 mMol/24 hrs). Random urine collections are reported in units of mmol/L, for which reference values are not established.

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

Test Details

Days Test Performed

Daily

Analytic Time

8 hours

Soft Order Code

POTQ

MiChart Code

Potassium, 24 HR Urine

Laboratory

Chemical Pathology

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.

Specimen Requirements

Offsite Collection Instructions

Collect 24 hour urine specimen with no preservative. Aliquot 10 ml into a plastic urine container and refrigerate. Record total 24 hour urine volume and collection dates/times on request form. Random urine also acceptable.

Rejection Criteria

Specimens collected with Boric Acid preservative are not acceptable. Diapers, sections of diapers, swabs or any other absorbent material will not be accepted as a collection container for urine.

Normal Volume

5 mL aliquot of 24 hour urine collection or 2 mL aliquot of random urine collection.

Minimum Volume

2 mL aliquot of 24 hour urine collection or 1 mL aliquot of random urine collection.