Human Lambda Free Light Chain Assay

Assay Principle
Human Lambda (λ) Free Light Chain Assay is based on a latex enhanced immunoturbidimetric assay. Lambda FLC in the sample binds to specific anti-Lambda FLC antibody, which is coated on latex particles, and causes agglutination. The degree of the turbidity caused by agglutination can be measured optically and is proportional to the amount of Lambda FLC in the sample. The instrument calculates the Lambda FLC concentration by interpolation of obtained signal of a 6-point calibration curve prepared from calibrators of known concentrations.

Features
Human Lambda Free Light Chain (FLC) assay has excellent across the Analytical Measuring Interval (AMI) in standard mode: 3.5 – 200 mg/L ; extended mode: 3.5 – 4000 mg/L. The method comparison gave a linear regression coefficient of 0.972, a slope of 1.054 and y-intercept of 0.636 mg/L. Precision of the assay was evaluated according to the CLSI EP5-A guidelines and has a Within-Run precision from 1.1% - 6.5% and a Total Precision of 1.1% - 11.4%. The Lambda assay displays outstanding sensitivity with an LOD of 2.8 (Export 2.3) mg/L; LOQ of 3.5 mg/L; and a LOB determined to be 1.6 (Export 1.1) mg/L.

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