DYES BASED ON DIPYRROMETHENE BORON DIFLUORIDE WITH BIPHOTONIC ABSORPTION AND THEIR USE

摘要

FIELD: physical analytical methods.;SUBSTANCE: invention relates to bioanalytical methods involving dye-labeled indicators. Bioanalytical method without separation is provided directed to measure analyte obtained from biological liquid or suspension, wherein are used: analyte microparticles as first biospecific reagent; and second biospecific reagent labeled with biphotonic fluorescent dye based on dipyrromethene boron difluoride containing at least one water solubility imparting group selected from ammonium salt and sulfonic or carboxylic acid alkali metal salt and at least one chemically active group selected from carboxylic acid, reactive carboxylic acid ester, carboxylic acid anhydride, maleimide, amine and isothiocyanate. In the method of invention, laser is focused onto reaction suspension and biphotonically excited fluorescence from individual microparticles (randomly flowing or oriented by pressure provided by emission of exciting laser through focal volume of laser beam).;EFFECT: increased efficiency of bioanalyses.;5 cl, 5 dwg, 5 tbl, 25 ex