2026-05-27T04:49:58Zhttps://riuma.uma.es/rest/oai/requestoai:riuma.uma.es:10630/206662026-02-03T11:54:05Zcom_10630_2254col_10630_37959
RIUMA. Repositorio Institucional de la Universidad de Málaga
author
García-Mesa, Juan Carlos
author
Montoro-Leal, Pablo
author
Maireles-Rivas, Silvia
author
López-Guerrero, María del Mar
author
Vereda-Alonso, Elisa Isabel
2021-01-08T08:33:03Z
2021-01-08T08:33:03Z
2021-01-08
https://hdl.handle.net/10630/20666
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 a
magnetic dispersive solid phase extraction (MDSPE) method for the extraction and
preconcentration of ultra-trace amounts of Hg(II). After first enrichment, a second online
preconcentration by cold vapor generation was conducted, followed by the determination of the
analyte by graphite furnace atomic absorption spectrometry (CV-GFAAS). The influences of several
analytical 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 sample
volume. For example, 5 mL of sample would be preconcentrated 10 times. Moreover, this method
is suitable for high sample volume, resulting in a preconcentration factor >250. The accuracy of the
proposed method was verified using a certified reference material (mussel tissue NIST 2976) and
by determining the analyte content in spiked sea waters 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 the
proposed method is simple, rapid, environmentally friendly and sensitive enough for the accurate
determination of mercury.
eng
Aguas marinas-Contaminación
Mercurio-Residuos
Determination of mercury in sea waters by magnetic dispersive solid phase extraction prior to quantitation by FI-CV-GFAAS
conference output
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URL
https://riuma.uma.es/bitstreams/023efecf-36b3-48cd-82ad-48786aed348d/download
File
MD5
5102cd9c80fb996fb73542a32f6aa278
339231
application/pdf
Hg FI-CV-GFAAS.pdf