YUNUSOVA, Nigora; MUXAMMADIYEVA, Mehrinigor; RO‘ZMETOV, Uchqun; SAYFIYEV, Maqsud. A SENSITIVE SORPTION–SPECTROPHOTOMETRIC METHOD FOR THE DETERMINATION OF CU(II) IONS IN NATURAL WATERS USING PYROCATECHOL BINAFSHA IMMOBILIZED ON A POLYETHYLENE POLYAMINE–POLYACRYLONITRILE (PPF-1) MATRIX. «ACTA NUUz», [S. l.], v. 3, n. 3.1, p. 491–494, 2026. Disponível em: http://journals.nuu.uz/index.php/actanuuz/article/view/11440. Acesso em: 30 apr. 2026.