Ethylenediamine Functionalized Nanoporous Silica Type LUS-1 for Highly Sensitive Analysis of Pb2+, Cd2+ and Zn2+ in Various Samples

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 (ICPOES). 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-1 was 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.