UB2M – “Beta 2 Microglobulin, Random Urine”

Updates to specimen preparation, alternate specimen, stability, methodology, reference range, and performed days.

Specimen Preparation: Send 10.0 mL of random urine in a Quest Beta-2 Microglobulin Transport Tube. Beta-2 Microglobulin in urine is unstable in acidic urine (less than pH 6). Exactly 10 mL of urine in the Quest Diagnostics Beta-2 Microglobulin Transport Tube is required to achieve the required pH of between 6 and 8. Any volume of urine above or below 10 mL will result in a pH that is outside the acceptable range. 

Minimum Volume: 10.0 mL

Alternate Specimen: Collect random urine. Immediately adjust the pH between 6 -8 with 1N NaOH. Send 10.0 mL urine in a screw capped plastic urine container. 

Stability: Room temperature: 5 days
                Refrigerated: 15 days
                Frozen: 30 days

Methodology: Immunoturbidometric 

Reference Range: < or = 0.20 mg/L

Performed Days: Monday – Saturday