Test Details
Mnemonic
UMAGQ
Ordering Code
3426900
CPT-4 Code(s)
83735, 82570, plus 81050 if volume measurement is performed
Specimen Information
Collect
24 hour urine (refrigerate during collection)
Specimen Preparation
After first morning void collect 24 hour urine with 25.0 mL 6N HCl, to maintain pH below 3. Last sample collected should be first morning void at the same time as the previous mornings first void. Mix urine well and send a 10.0 mL aliquot in a screw capped urine cup. Record 24 hour volume on cup. Keep urine refrigerated during collection.
Alternate Specimen
Preservative may be added within 4 hours after collection is completed
Minimum Volume
1.0 mL
Transport Temperature
Refrigerated
Stability
Room temperature: 4 days
Refrigerated: 7 days
Frozen: 90 days
Refrigerated: 7 days
Frozen: 90 days
Methodology
Atomic Absorption Spectrometry
Reference Range
Magnesium, 24 Hour Urine
Adult Male: 28 - 180 mg/24 h
Adult Female: 18 - 130 mg/24 h
Magnesium, 24 Hour Urine
Adult Male: 16 - 90 mg/g creat
Adult Female: 30 - 135 mg/g creat
Creatinine, 24 hour Urine
3-8 years: 0.10 - 0.80 g/24 h
9-12 years: 0.20 - 1.40 g/24 h
13-17 years: 0.40 - 1.90 g/24 h
>17 years: 0.50 - 2.15 g/24 h
Adult Male: 28 - 180 mg/24 h
Adult Female: 18 - 130 mg/24 h
Magnesium, 24 Hour Urine
Adult Male: 16 - 90 mg/g creat
Adult Female: 30 - 135 mg/g creat
Creatinine, 24 hour Urine
3-8 years: 0.10 - 0.80 g/24 h
9-12 years: 0.20 - 1.40 g/24 h
13-17 years: 0.40 - 1.90 g/24 h
>17 years: 0.50 - 2.15 g/24 h
Performing Laboratory
Quest
New York DOH Approval Status
Yes