Objective To investigate the verification method for immunological qualitative test performance in accordance with CNAS-CL39requirement.Methods HBsAg by ELISA method was taken as the example to verify the performance index based authentication methods,based on the detection limit of the blank and sample detection limit,according to the EP15-A2standard authentication precision.A 2×2contingency table was taken to verify compliance rate of the method,HBsAg-negative patients were used to verify the value of the...