RT Conference Proceedings
T1 Determination of mercury in sea waters by magnetic dispersive solid phase extraction prior to quantitation by FI-CV-GFAAS
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 Aguas marinas-Contaminación
K1 Mercurio-Residuos
AB Mercury is a non-essential trace element that is toxic to humans due to the bioaccumulation effect.In this work, a shell structured Fe3O4@graphene oxide nanospheres were used to develop amagnetic dispersive solid phase extraction (MDSPE) method for the extraction andpreconcentration of ultra-trace amounts of Hg(II). After first enrichment, a second onlinepreconcentration by cold vapor generation was conducted, followed by the determination of theanalyte by graphite furnace atomic absorption spectrometry (CV-GFAAS). The influences of severalanalytical parameters were optimized for MDSPE and CV-GFAAS. Under the optimized conditions,%RSD, detection limit and determination limit were 2.9%, 0.25 ng·L-1 and 4.9 ng·L-1, respectively.Thanks to the 500 μL loop, a high preconcentration factor can be achieved even with low samplevolume. For example, 5 mL of sample would be preconcentrated 10 times. Moreover, this methodis suitable for high sample volume, resulting in a preconcentration factor >250. The accuracy of theproposed method was verified using a certified reference material (mussel tissue NIST 2976) andby determining the analyte content in spiked sea waters and tap water samples collected fromMálaga and Cádiz (Spain). The determined values were in good agreement with the certified valuesand the recoveries for the spiked samples were close to 100% in all cases. The results showed theproposed method is simple, rapid, environmentally friendly and sensitive enough for the accuratedetermination of mercury.
YR 2021
FD 2021-01-08
LK https://hdl.handle.net/10630/20666
UL https://hdl.handle.net/10630/20666
LA eng
NO Shotgun Presentation
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía TechFondos Feder y Junta de Andalucía Proyecto UMA18-FEDERJA-060Plan Propio, Proyecto Puente, Universidad de Málaga
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 ene 2026