RT Journal Article
T1 Sensitive determination of mercury by magnetic dispersive solid-phase extraction combined with flow-injection-cold vapour-graphite furnace atomic absorption spectrometry
A1 García-Mesa, Juan Carlos
A1 Montoro-Leal, Pablo
A1 Maireles-Rivas, Silvia
A1 López-Guerrero, María del Mar
A1 Vereda-Alonso, Elisa Isabel
K1 Espectroscopía de absorción atómica
AB Mercury is a non-essential trace element that is toxic to humans due to the bioaccumulation effect. In this work, a ferrofluid based on Fe3O4@graphene oxide nanospheres together with an ionic liquid was used to develop a magnetic dispersive solid-phase extraction (MDSPE) method for the extraction of the complex formed between the chelating agent methyl thiosalicylate (MTS) and mercury. This MDSPE methodology was combined with an automatic analysis by flow injection-cold vapour-graphite furnace atomic absorption spectrometry (FI-CV-GFAAS). The developed semiautomatic method was applied to the determination of ultra-trace amounts of Hg(II) in biological and environmental samples. Several analytical parameters for MDSPE and FI-CV-GFAAS, such as pH, MTS concentration, eluent composition, extraction time, etc., were optimized by uni and multivariate methodologies. Under the optimized conditions, the %RSD, detection limit and determination limit were 2.9%, 0.25 ng L−1 and 4.9 ng L−1, respectively. The achieved preconcentration factor with the MDSPE methodology was 250. The accuracy of the proposed method was verified using a Standard Reference Material (Mussel Tissue SRM 2976) and by determining the analyte content in spiked seawater and tap water samples collected from Málaga and Cádiz (Spain). The determined values were in good agreement with the certified values and the recoveries for the spiked samples were close to 100% in all cases. The results showed that the proposed method is simple, rapid, environmentally friendly, highly sensitive and accurate for determination of mercury in biological and environmental samples.
PB Royal Society of Chemistry
YR 2021
FD 2021-03-31
LK https://hdl.handle.net/10630/24008
UL https://hdl.handle.net/10630/24008
LA eng
NO García-Mesa, Juan Carlos ; Montoro-Leal, Pablo ; Maireles-Rivas, Silvia ; López-Guerrero, María del Mar ; Vereda-Alonso, Elisa Isabel. Sensitive determination of mercury by magnetic dispersive solid-phase extraction combined with flow-injection-cold vapour-graphite furnace atomic absorption spectrometry. 	J. Anal. At. Spectrom., 2021,36, 892-899. https://doi.org/10.1039/D0JA00516A
NO Funding for open access charge: Universidad de Málaga. The authors thank the University of Malaga (Proyecto Puente UMA) and Junta de Andalucía, Project UMA18FEDERJA060 for supporting this study and the Spanish Ministerio de Ciencia y Tecnología for the fellowship FPU18/05371.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 5 mar 2026