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Phosphorus (PO4), Serum

Mnemonic:    [PHOS]
Name:    Phosphorus (PO4), 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:    0 - 9 days: 4.5 - 9.0 mg/dL
 10 days - 23 mos: 4.5 - 6.7 mg/dL
 2 yrs - 11 yrs: 4.5 - 5.5 mg/dL
 12+ yrs - Adult: 2.7 - 4.4 mg/dL
Critical Range:    0 - 9 Days: <1.0 or >12.0 mg/dL
 10 Days - 24 mos: <1.0 or >10.0 mg/dL
 2+ yrs: <1.0 or >6.5 mg/dL
  Method:    Colorimetric Molybdate