RT Conference Proceedings
T1 Cold vapour generation electrothermal atomic absorption spectrometry and solid phase extraction based on a new nanosorbent for sensitive HG determination in environmental samples (sea water and river water)
A1 Vereda-Alonso, Elisa Isabel
A1 Siles-Cordero, María Teresa
A1 López-Guerrero, María del Mar
A1 García-de-Torres, Amparo
A1 Cano-Pavón, José Manuel
K1 Mercurio
AB Mercury is not an essential element for plant or animal life and it is a potentialenvironmental toxic because of its tendency to form covalent bonds with organicmolecules and the high stability of the Hg-C bond. Reports estimate a total mercuryconcentration in natural waters ranging from 0.2 to 100 ng L-1. Due to this fact, highlysensitive methods are required for direct determination of such extremely low levels. Inthis work, a rapid and simple method was developed for separation and preconcentrationof mercury by flow injection solid phase extraction coupled with on-linechemical vapour generation electrothermal atomic absorption spectrometry. Thesystem is based on chelating retention of the analyte onto the mini column filled with amesoporous silica functionalized with 1,5 bis (di-2-pyridyl) methylenethiocarbohydrazide. The main aim of this work was to develop a precise and accuratemethod for the determination of the Hg. Under the optima conditions and 120 spreconcentration time, the detection limit obtained was 0.009 μg L-1, with RSDs 3.7 %for 0.2 μg L-1, 4.8 % for 1 μg L-1 and enrichment factor 4, Furthermore, the methodproposed has permitted the determination of Hg with a reduction in the analysis time,the sample throughput was about 18 h-1, low consumption of reagents and samplevolume.The method was applied to the determination of Hg in sea water and river water. Forthe quality control of the analytical performance and the validation of the newlydeveloped method, the analysis of two certified samples, TMDA 54.4 Fortified Lake,and LGC6187 River sediment was addressed. The results showed good agreementwith the certified values.
YR 2016
FD 2016-07-07
LK http://hdl.handle.net/10630/11771
UL http://hdl.handle.net/10630/11771
LA eng
NO Reunión bianual del Grupo Regional Andaluz de la Sociedad Española de Química Analítica
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 ene 2026