Magnesium Level*
Methodology
Colorimetric Absorbance
Performing Laboratory
Rutland Regional Medical Center Laboratory
Specimen Requirements
Specimen Type: Blood
Container/Tube: Serum
Preferred: Light-green top (lithium heparin gel)
Acceptable: Gold top, serum gel
Specimen Volume: Full tube
Specimen Minimum Volume: 2 mL
Collection Instructions:
1. Send specimen in original tube.
2. If there is a delay in transport of >1 hour, centrifuge tube.
Specimen Transport Temperature
Refrigerated
Normal Reference Values
1.6-2.3 mg/dL
Day(s) Performed
Daily
Analytical Time:
1 day
Available STAT
Test Classification and CPT Coding
83735
Critical Values
<1.1 or >4.9 mg/dL (automatic call-back)