Colorimetric (Xylidyl Blue)
To aid in assessing cellular magnesium loss
50 - 200 mg/24 hrs (5-20 mMol/24 hrs). Random urine collections are reported in units of mg/dL, for which reference values are not established.
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Days Test Performed
Soft Order Code
Magnesium, 24 HR Urine
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Offsite Collection Instructions
Collect 24 hour urine in a clean, plastic container with no metal cap or glued insert and no preservative. Aliquot 5 mL urine into a clean, plastic container with no metal cap or glued insert and refrigerate. Record total 24 hour urine volume and collection dates/times on request form. Random urine also acceptable.
Specimens collected with Boric Acid preservative are not acceptable.
5 mL aliquot of 24 hour urine collection or 2 mL aliquot of random urine collection.
2 mL aliquot of 24 hour urine collection or 1 mL aliquot of random urine collection.