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Calcium, Total, Serum

Mnemonic:    [CA]
Name:    Calcium, Total, 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:    8.6 - 10.4 mg/dL
Critical Range:    <7.0 or >13.5 mg/dL
  Method:    Colorimetric; Arsenazo III @ 680