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Laboratory Medicine

Test catalogue

Magnesium Random Urine

Test Name

Magnesium Random Urine

Urine sample Specimen Type / Requirements

Container Type = Small orange cap container

Minimum Volume = 5 mL urine

Specimen Handling

Collection Instructions: Collect Random Urine in a small orange cap container. Indicate date and time of Collection

Laboratory Staff Instructions: Create an aliquot from the sample and Centrifuge before placing on automation line using the bypass rack. Urine random and 24h collection without preservative must be acidified to pH 1.0 with 6N HCl before analysis.

Sample Rejection Criteria: Unlabeled or leaking specimen.

Stability:Stable for 1 week at room temperature or refrigerated and frozen -15 to -20°C for 1 year.

Transportation: Send sample to core lab ASAP

Required Documentation

Turnaround Time (TAT)

1 Day

Test Utilization


Reference Value

Urine: 3.0 – 4.2 mmol/d

Test Code



Spectrophotometric (Colorimetric; Endpoint method)

Testing Location


Other Information

Last Updated: September 30, 2019