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Test Code NBLD0176 Magnesium, 24 Hour Urine

Methodology

Colorimetric Methylthymol Blue (MTB)/Bichromatic End point

Performing Laboratory

Bozeman Health Laboratory Services

Specimen Requirements

Specimen Type: Urine
Container/Tube: 24-hour urine collection container
Specimen Volume:

Preferred: 10 mL

Acceptable: Entire collection
Specimen Minimum Volume: 1 mL
Collection Instructions:
1. Collect a 24-hour urine specimen.

2. No preservative required.

3. Refrigerate specimen during collection.

4. Mix well before taking aliquot.

Additional Information:

1. Starting and ending times of collection are required.

2. Follow instructions in Urine Collection in Special Instructions.

Specimen Transport Temperature

Refrigerated

Specimen Stability

 

Specimen Type Temperature Time
Urine Ambient 7 days
  Refrigerated 7 days

 

Reference Values

24.0-255.0 mg/24 hours

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding

83735-Magnesium

81050-Urine timed measurement (if appropriate)

Special Instructions