Performance characteristics of beta-2-microglobulin measurements on a Beckman Immage analyzer with the DakoCytomation reagent kit

ObjectiveEvaluation of serum beta-2-microglobulin (β2M) in an automated analyzer.Design and methodsThe DakoCytomation β2M kit is an antibody based reagent intended for quantitative determination of β2M in serum and plasma by rate nephelometry.ResultsThe limit of blank is 0.16 mg/L. The method is linear up to 17.9 mg/L. The imprecision ranged from 2.1% to 7.9% at the concentrations of 1.77 and 7.19 mg/L, respectively. Method comparison yielded slope = 1.009, r = 0.998. No interference was observed from hemolytic or icteric specimens. Reference interval of a healthy population was 1.13 mg/L to 3.04 mg/L.ConclusionThe DakoCytomation reagent is acceptable to measure serum β2M.