Mostafavi, A., D. Afzali, and M. A. Taher. “Simultaneous Separation and Preconcentration Trace Amounts of Cd2+, Mn2+, Ni2+, Zn2+ and Fe2+ onto Modified Amberlite XAD-4 Resin That Loaded With Pyrocatechol Violet”. Asian Journal of Chemistry 18, no. 3 (March 30, 2010): 2303–2309. Accessed November 5, 2024. https://asianpubs.org/index.php/ajchem/article/view/20988.