RT Conference Proceedings
T1 Development of a new method for preconcentration, chemical vapour generation and determination of metal ions by ICP OES in environmental samples using magnetic nanoparticles
A1 López-Guerrero, María del Mar
A1 Siles-Cordero, María Teresa
A1 Vereda-Alonso, Elisa Isabel
A1 García-de-Torres, Amparo
A1 Cano-Pavón, José Manuel
K1 Nanopartículas
AB Silica-coated magnetic nanoparticles (MNP SCMNPs) modified with [1,5-bis (2-pyridyl)-3-sulphophenylmethylene] thiocarbonohydrazide were synthesized by a sol-gel method. These magnetic nanoparticles (PSTHmnp)were employed as a SPE adsorbent for separating and concentrating trace amounts 14 elements (Pd, Cr, Mn,Zn, Cd, Hg, As, Sb, Bi, Cu, Pt, Sn, Se, Co) from environmental samples. The main aim of this work was todevelop a precise and accurate method for the simultaneous determination of the aforementioned metals fromnatural water samples (sea water, estuarine, lake and river water) by the on line pre-concentration SPE CVG ICPOES using PSTH-mnp, with the least demanding and simple sample preparation procedure. The developedmethod was validated by analysing natural water certified reference materials (SLRS-4, TMDA 54.4, SW2 Batch125, SRM 1643e). Sea water and water well samples collected from Malaga (Spain) were analysed too.The procedure has demonstrated to be fast, easy, automatic, selective, low cost and with good sensitivity. Themain advantage of PSTH-mnp is its very good stability and resistance because chemisorption of chelatingmolecules on the surface of solid supports provides immobility, mechanical stability and insolubility. It costs islow compared with other chelating sorbents. The detection limits obtained are adequate for the analyzed samples.Furthermore, the method proposed has permitted the simultaneous determination of the 14 elements, saving timeof analysis and achieving a sample throughout of about 12.8 h-1.Table 1. Analytical performance.Element Detectionlimit/ μgL-1Determinationlimit / μg L-1EnrichmentfactorElement Detectionlimit/ μgL-1Determinationlimit / μg L-1EnrichmentfactorPd 3.67 17.23 6.5 Sb 0.04 0.96 32.3Cr 7.16 25.26 1 Bi 0.23 31.3 2.95Mn 3.16 22.92 1.5 Cu 28.42 1.0 1.52Zn 11.30 51.70 2.1 Pt 8.81 2.7 4.46Cd 0.59 4.02 46.85 Sn 17.10 3.3 4.53Hg 0.02 0.75 1.82 Se 2.85 83.6 4.79As 0.01 2.32 113.4 Co 0.49 385.5 2.69Keywords: MNPs, ICP-OES, trace elements determination, environmental watersAcknowledgements The authors thank the Spanish Ministerio de Ciencia y Tecnología (MCyT project no.CTQ2013-44791-P) for supporting this study and also FEDER funds. And Universidad de Málaga, Plan Propioand Universidad de Málaga, Campus de Excelencia Internacional del Mar, CEI MAR.
YR 2015
FD 2015-12-21
LK http://hdl.handle.net/10630/10858
UL http://hdl.handle.net/10630/10858
LA eng
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026