University of Kashan Journal of Nanostructures 2251-7871 3 1 2013 03 01 Ethylenediamine Functionalized Nanoporous Silica Type LUS-1 for Highly Sensitive Analysis of Pb2+ , Cd2+ and Zn2+ in Various Samples 53 63 5442 10.7508/jns.2013.01.007 EN L. Hajiaghababaei Department of Chemistry, Islamic Azad University, Shahre rey Branch, Tehran, Iran. A. Badiei School of chemistry, College of Science, University of Tehran, Tehran, Iran. N. Shaabani Department of Chemistry, Islamic Azad University, Shahre rey Branch, Tehran, Iran. M. R. Ganjali Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran. G. Mohammadi Ziarani Department of Chemistry, Faculty of Science, Alzahra University, Tehran, Iran. M. Javadi Charani School of chemistry, College of Science, University of Tehran, Tehran, Iran. Journal Article 2014 05 17 In this work, a novel method is described for the preconcentration of Pb²⁺, Cd²⁺and Zn²⁺ ions in environmental samples using uniform silanized mesopor (LUS-1) functionalized by ethylenediamine groups as a new extractant. The determination of ions is done by inductively coupled plasma optical emission spectrometry (ICP-OES). The extraction time and efficiency, pH and amount of adsorbent, minimum amount of stripping acid and break-through volume were investigated. The method’s enrichment factor is100 and detection limit is 0.45, 0.05 and 0.03 ng mL^-1 for Pb²⁺, Cd²⁺and Zn²⁺ respectively. The maximum capacity of the one mg of functionalized LUS-1was found to be 150.0 (±2.0) µg and 93.0 (±1.7) µg and 125.0 (±1.2) µg of Pb²⁺, Cd²⁺and Zn²⁺ respectively. The method was applied successfully for the preconcentration and determination of trace amounts of Pb²⁺, Cd²⁺ and Zn²⁺in water and food samples. https://jns.kashanu.ac.ir/article_5442_9d6d664137f50c17997b5412dea0e504.pdf