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Magnesium, AA, 24-Hour Urine with Creatinine
Test Code19742
CPT Codes
82570, 83735
Preferred Specimen
10 mL urine aliquot of a 24-hour urine collection in 25 mL 6N HCl collected in a leak-proof urine container
Minimum Volume
1 mL
Other Acceptable Specimens
Other acceptable preservatives: 10 g Boric Acid or 10 mL conc. glacial acetic acid. Adding preservative after collection is acceptable
Instructions
Please submit a 10 mL aliquot of a 24-hour collection. Collect urine with 25 mL of 6N HCL to maintain a pH below 3. Refrigerate during and after collection. Do not include first morning specimen; collect all subsequent voiding's. The last sample collected should be the first morning specimen voided the following morning at the same time as the previous morning's first voiding. Record 24-hour urine volume on test request form and on urine vial.
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
Room temperature: 4 days
Refrigerated: 7 days
Frozen: 90 days
Refrigerated: 7 days
Frozen: 90 days
Methodology
Inductively Coupled Plasma-Mass Spectrometry
FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Setup Schedule
Set up: Tues-Sat; Report available: 1-2 days
Reference Range
See Laboratory Report
