SUMMARY
In this work were conducted development and characterization of enzyme immunoassay (ELISA) to determine total IgE-antibodies using tyramine-biotin reagent (TBR). It was shown that the use of ELISA modifications with avidin-biotin amplification (ABA) and TBR significantly extend application analysis dose human IgE below 50 IU/ml. For the purposes of clinical diagnosis was the most appropriate ELISA with ABA, however, when there is the need to define micro-concentrations of analyte (10-10 g), the only possible option is ELISA with TBR. When used ELISA reagent concentration dynamic range for all modifications made three orders.