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Sodium, Urine 24 Hour

Mnemonic:    [U24 Na]
Name:    Sodium, Urine 24 Hour
Specimen:    1 mL aliquot from a 24 hour urine collection. Refrigerate during collection.
Spec Stability:    Stable 5 days refrigerated.
Reference Range:    40 - 200 mmol/24hr
  Method:    Potentiometric
Note:    This test does not require a preservative during collection. Do not adjust the pH before testing.

Collection instructions for a 24 hour urine sample