Egunova Olga Romanovna RussiaSaratovSSU. Institute of Chemistry., 410012, Saratov, Astrakhanskaya str., 83, building. 1, Institute of Chemistry, SSU aurumo4ka@mail.ru Author's articles МАГНИТНЫЕ НАНОЧАСТИЦЫ МАГНЕТИТА В РАЗДЕЛЕНИИ И КОНЦЕНТРИРОВАНИИ Synthesis of Monodisperse Magnetite: The Effect of Temperature, Sodium Hydroxide and Citric Acid Concentrations on the Size of Nanoparticles Sorption-fluorimetric Determination of Enrofloxacin with Magnetite Nanoparticles Modified by Polyethylenimine Preconcentration of Е110 and Е124 Food Azodyes on Magnetite Nanoparticles Modified by CTAB