YUNUSOVA N, MUXAMMADIYEVA M, RO‘ZMETOV U, SAYFIYEV M. 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. NUUz [Internet]. 2026 Mar. 18 [cited 2026 Apr. 30];3(3.1):491-4. Available from: http://journals.nuu.uz/index.php/actanuuz/article/view/11440