Sign in →

Magnesium, 24 Hour, Urine

Important Note

Until further notice please order Mayo test LABMAGU.

Additional Codes

Test Name in EPIC EPIC Test Code Mnemonic
MAGNESIUM, 24HR UR LAB80 U24MG

 

Methodology

Arsenazo

Specimen Requirements

Specimen Type: Urine, 24-hour

Container/Tube: Aliquot tube

Specimen Volume: 5 mL

Specimen Minimum Volume: 2 mL

Collection Instructions: Add 25 mL of 6N HCl as preservative at the start of collection. Mix well.

Additional Information:

1. Starting and ending times of collection and 24-hour volume are required.

2. See Urine Collection in Special Instructions for 24-hour urine collection instructions.

 

Performing Laboratory

Measure total timed urine volume. Enter volume and hours of collection into LIS. Pour aliquot of urine into a smaller testing container and adjust the pH to <2.0  If specimen is cloudy, spin and separate supernatant. Refrigerate specimen until analysis is performed.

Specimen Transport Temperature

Refrigerate 5 days/Frozen OK/Ambient NO

Day(s) Test Set Up

Monday through Sunday

Reference Values

6-10 mEq/24 hours

Performing Laboratory

Chemistry-

SMDC Clinical Lab

Test Classification and CPT Coding

83735

Special Instructions