Jawad SK, Muslim NM. Liquid Ion Exchange for Extraction and Spectrophotometric Determination of Tungestate WO4Ë­ by Use Azo-derivative. J. K. Chem. Sci. [Internet]. 2016 Mar. 24 [cited 2026 Aug. 29];(10). Available from: https://journal.uokufa.edu.iq/index.php/jkcs/article/view/3397