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 (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.