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.

Test Details
Days Set Up
Analytic Time

8 hours

Soft Order Code
MiChart Code
Potassium, Random Urine
Chemical Pathology
Specimen Requirements
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.

Alternate Specimen
Specimens collected with glacial acetic acid or HCl preservative are acceptable. If collected in container with acid preservative, indicate on container and requisition: "Collected in Acid".
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.
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.
CPT Code
Fee Code
POTU 2828-2 POTQ 2829-0
NY State Approved