caa a22 4500 445879467 CHVBK 20180317145538.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s00604-010-0503-1 doi (NATIONALLICENCE)springer-10.1007/s00604-010-0503-1 Comparison of novel pyridine-functionalized mesoporous silicas for Au(III) extraction from natural samples [Elektronische Daten] [Homeira Ebrahimzadeh, Najmeh Tavassoli, Omid Sadeghi, Mostafa Amini, Moein Jamali] A technique for solid-phase extraction utilizing pyridine-functionalized nanoporous silica (MCM-41, MCM-48 and SBA-15) was developed for the determination of gold in different samples using flame atomic absorption spectrometry. The effects of concentration and volume of eluent, pH of the solution, flow rate of extraction, sample volume and of potentially interfering ions on the efficiency of preconcentration and recovery was investigated. The limit of detection is lower than 45pgmL−1. Under optimal conditions, the accuracy and precision (RSD%) of the method were calculated to be >99.5% and <0.7% for the two MCMs (41 and 48) and >89.5%, and <1.5% for SBA-15, respectively. The SPE technique was used to determine the concentration of gold in natural and industrial wastewater with satisfactory results. Figure A schematic model of modified mesoporous (MCM-41, MCM-48, SBA-15) with pyridine, and adsorption of Au(III) Springer-Verlag, 2010 Solid phase extraction nationallicence Pyridine-functionalized mesoporous silica nationallicence Py-MCM-41 nationallicence Py-MCM-48 nationallicence Py-SBA-15 nationallicence Gold nationallicence Ebrahimzadeh Homeira Department of chemistry, Shahid Beheshti University, G.C 1983963113, Tehran, Iran aut Tavassoli Najmeh Department of chemistry, Shahid Beheshti University, G.C 1983963113, Tehran, Iran aut Sadeghi Omid Department of chemistry, Shahid Beheshti University, G.C 1983963113, Tehran, Iran aut Amini Mostafa Department of chemistry, Shahid Beheshti University, G.C 1983963113, Tehran, Iran aut Jamali Moein Department of chemistry, Shahid Beheshti University, G.C 1983963113, Tehran, Iran aut Microchimica Acta Springer Vienna 172/3-4(2011-03-01), 479-487 0026-3672 172:3-4<479 2011 172 604 https://doi.org/10.1007/s00604-010-0503-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00604-010-0503-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ebrahimzadeh Homeira Department of chemistry, Shahid Beheshti University, G.C 1983963113, Tehran, Iran aut NATIONALLICENCE 700 1- Tavassoli Najmeh Department of chemistry, Shahid Beheshti University, G.C 1983963113, Tehran, Iran aut NATIONALLICENCE 700 1- Sadeghi Omid Department of chemistry, Shahid Beheshti University, G.C 1983963113, Tehran, Iran aut NATIONALLICENCE 700 1- Amini Mostafa Department of chemistry, Shahid Beheshti University, G.C 1983963113, Tehran, Iran aut NATIONALLICENCE 700 1- Jamali Moein Department of chemistry, Shahid Beheshti University, G.C 1983963113, Tehran, Iran aut NATIONALLICENCE 773 0- Microchimica Acta Springer Vienna 172/3-4(2011-03-01), 479-487 0026-3672 172:3-4<479 2011 172 604 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer