METHOD FOR MAKING PANEL OF HBsAg SUBTYPES AD AND AY SERUMS FOR QUALITY CONTROL OF DIAGNOSING HEPATITIS B

摘要

FIELD: medicine. ^ SUBSTANCE: what is presented is a method for making a panel of serums for the purpose of quality control of diagnosing hepatitis B with the certified low concentration of HBsAg subtypes AD and AY which involves the analysis of donor serums for the presence of anti-HIV, anti-HCV and anti-HBs antibodies and the nonspecific HBsAg binding; the selection of donor serums with said parameters not found; the use of the selected serums to prepare diluting solutions with a stabilising additive introduced; the certification of the monopreparations of HBsAg subtypes AD and AY by titration dilutions of international standards and the preparation of a reference panel from the certified monopreparations of HBsAg subtypes AD and AY within the range of 0.01 to 0.5 IU/ml; the lyophilisation of the serums followed by thermal degradation panel testing to determine a shelf life. The use of a new formulation of the stabilising additive containing proline 200-250 mM and benzoic acid 0.05-0.08 wt %, and the selection of an optimum temperature storage conditions promote the prolonged activity preservation at annual loss (at +4C) making less than 0.5%. ^ EFFECT: higher shelf life. ^ 3 cl, 5 tbl, 1 dwg, 1 ex