2,6-DIMETHYL-4-MERCAPTOQUINOLINE AS A NEW ANALYTICAL REAGENT FOR SPECTROPHOTOMETRIC DETERMINATION OF COPPER (II). Proceedings of the YSU B: Chemical and Biological Sciences, [S. l.], v. 60, n. 1 (268), p. 88–94, 2026. DOI: 10.46991/PYSUB.2026.60.1.088. Disponível em: https://journals.ysu.am/proceedings-chem-biol/article/view/vol60_no1_2026_pp088-094. Acesso em: 6 may. 2026.