Mohamad, S. and Radzi Abas, M. (2005) “Enrichment of Cu, Zn and Cd by Solid-Phase Extraction using Silica Gel Chemically Modified with Hydroxamic Acid Prior to Their Determination by Flame Atomic Absorption Spectrometry”, Malaysian Journal of Science, 24(2), pp. 65–70. Available at: https://juku.um.edu.my/index.php/MJS/article/view/8330 (Accessed: 22 December 2024).