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Sodium (Na), Serum

Mnemonic:    [NA]
Name:    Sodium (Na), Serum
Specimen:    1 mL serum from a Red SST or Red top tube, or plasma from a Green PST.
Spec Stability:    Stable 5 days refrigerated.
Reference Range:    137 - 145 mmol/L
Critical Range:    <= 120 or >=155 mmol/L
  Method:    Potentiometric