alghurabi, F. .A.Wannas. “Microamount Determination and Extraction of Mn(VII),Ni(II) As Anion in Different Vital and Environmental Samples With 2-[α-Naphthol Azo]-4,5-Diphenl imidazole[α-NADPI]”. Al-Qadisiyah Journal of Pure Science, Vol. 19, no. 1, July 2017, https://journalsc.qu.edu.iq/index.php/JOPS/article/view/92.