| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Magnesium, Urine
Test Code8485
Alias/See Also
Mg, Urine; 24 hr urine mg; magnesium, urine
Preferred Specimen
24-hour urine. Urine must be refrigerated during collection.
Minimum Volume
4 mL aliquot from a well-mixed 24-hour collection at 2-8°C. (Min: 0.5 mL) Submit specimen in an ARUP Standard Transport Tube.
Transport Temperature
4 mL aliquot from a well-mixed 24-hour collection at 2-8°C. (Min: 0.5 mL) Submit specimen in an ARUP Standard Transport Tube.
Specimen Stability
Ambient: 1 week, if acidified; Refrigerated: 1 week; Frozen: 1 year
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Specimens containing preservatives other than HCl or in metal containers.
Methodology
Spectrophotometry
Setup Schedule
Sun-Sat
Report Available
Within 24 hours
Limitations
Adjust pH to 1 by adding 6M HCl (approximately 10 mL HCl/24-hour specimen based on normal adult output of 1000 - 2000 mL/24 hours. Pediatric specimens will require less than 10 mL to reach the correct pH). Record total volume and collection time interval on transport tube and test request form. Also acceptable: random urine.
