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Test Code SQ MG, EPIC LAB103 Magnesium, Plasma


Chlorophosphonazo III/Colorimetric

Performing Laboratory

Meriter Laboratories

Specimen Requirements

Specimen Type: Plasma
Container/Tube: Light-green top (lithium heparin gel)
Specimen Volume: 1 mL

Collection Instructions: Avoid hemolysis.

Specimen Transport Temperature


Reference Values

1.6-2.4 mg/dL
Critical values (automatic call-back): ≤1.0 mg/dL or ≥8.0 mg/dL

Note: Levodopa and intralipid (2,000 mg/L) cause artificially-high magnesium results.

Day(s) Test Set Up

Monday through Sunday

Specimen Requirements Additional Information

Specimen Stability:

Plasma is stable at ambient temperature (15o C-25o C) for 7 days, refrigerated (2o C-8o C) for 7days, and frozen (≤-20o C) for 1 year.

Test Classification and CPT Coding