Pourjavid, Mohammad Reza, and Ali Akbari Sehat. 2012. “Preparation of a Modified Octadecyl Silica Membrane Disk for Solid Phase Extraction of Lead(II) Ions in Different Real Samples and Their Determination With ICP-AES”. Journal of Membrane and Separation Technology 1 (1):9-18. https://doi.org/10.6000/1929-6037.2012.01.01.2 .