Complex formation of Cr3+, Mn2+, Ni2+ and Cu2+ ions using 1-((2E,3E)-3-(hydroxyimino)butan-2-ylidene)urea . JOPAS [Internet]. 2018 Dec. 20 [cited 2026 Jan. 20];17(2). Available from: https://sebhau.edu.ly/journal/jopas/article/view/149