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Test Code MG Magnesium, Plasma or Serum

Performing Laboratory

Mary Washington Healthcare-Department of Pathology and Laboratory Medicine-Chemistry

Specimen Requirements

Submit only 1 of the following specimens:

 

Preferred:

Serum

Container/Tube:  Plain, red-top tube(s) or serum gel tube(s)

Volume:  1 mL of serum

Transport Temperature:  Refrigerate

Collection Instructions:  Avoid hemolysis.

Note:  Label specimen appropriately (serum).

 

Alternate:

Plasma

Container/Tube:  Green-top (heparin) tube(s)

Not Acceptable: Light blue-top (sodium citrate) tube, lavender-top (EDTA) tube, or grey-top (potassium oxalate/sodium fluoride) tube

Volume:  1 mL of heparinized plasma

Transport Temperature:  Refrigerate

Collection Instructions:  Avoid hemolysis.

Note:  Label specimen appropriately (plasma).

Reference Values

1.6-2.3 mg/dL

Day(s) Test Set Up

Monday through Sunday