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Test Code MAGRBC Magnesium, RBC  

Important Note

Centrifuge tube within 45 minutes of collection and separate as much  plasma from cells as possible. Send the plasma and the original collection tube with  RBCs to the laboratory.

 

Collection Container

Green-top (heparin) tube, lavender-top (EDTA) tube, royal blue-top (EDTA) tube, or tan-top lead-free tube (SEE ORDERING NOTE)

Specimen Required

Submit plasma and RBC's in original tube to chemistry laboratory.

Specimen Volume

1 mL Red blood cells, RBC'S (From proper tube type)

Minimum Specimen Volume

0.2 mL Red blood cells, RBC's (From proper tube type)

Transport Temperature

Room temperature

Specimen Stability

Room temperature

14 days

Refrigerated

14 days,

Frozen

14 days

Freeze/thaw cycles

Stable x3

Methodology

Atomic absorption spectrometry (AAS); inductively-coupled plasma/mass spectrometry (ICP/MS)

Reference Ranges

4.2−6.8 mg/dL

CPT Code

83735             

Cause for rejection

Serum or plasma specimen