| Ordering Code | 200 |
|---|---|
| Test Name | Magnesium |
| Alias | MG |
| Preferred Specimen | Serum |
| Preferred Container | SST (Gold) |
| Other Specimen/Container | Serum in Plain (Red), Plasma in Lithium Heparin (Green-PST), Plasma in Lithium Heparin (Dark Green-PP No Gel) |
| Optimum Volume | 1 mL |
| Handling Instructions | All specimen types must be centrifuged within 2 hours of collection. If no gel separation present in tube and testing delayed, plasma/serum is aliquoted from cells within 2 hours of collection. |
| Transport Requirements | Oahu: Refrigerated Airline: Refrigerated |
| Specimen Stability | Refrigerated: 1 Week Frozen: 1 Year (Aliquot) Frozen samples should be thawed once. |
| Rejection Criteria | Moderately hemolyzed, Insufficient quantity, Specimen older than stability limits |
| Avail. Stat | YES |
| Analytic Time | 1 Day |
| Methodology | Xylidyl Blue |
Reference range(s)
The reference ranges listed below are valid on this date of October 27, 2025.
| Component | Age | Male Norm | Male Critical Low | Male Critical High | Female Norm | Female Critical High | Female Critical Low | Units | Add'l info |
|---|---|---|---|---|---|---|---|---|---|
| Magnesium | ALL | 1.5-2.5 | <= 1.0 | >= 3.5 | 1.5-2.5 | >= 3.5 | <= 1.0 | mg/dL |
