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Potassium, Serum (K)

Mnemonic:    [K]
Name:    Potassium, Serum (K)
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:    3.5 - 5.1 mmol/L
Critical Range:    < 3.0 or > 6.0 mmol/L
  Method:    Potentiometric