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dc.contributor.authorGarcía-Mesa, Juan Carlos
dc.contributor.authorMontoro-Leal, Pablo
dc.contributor.authorMaireles-Rivas, Silvia
dc.contributor.authorLópez-Guerrero, María del Mar 
dc.contributor.authorVereda-Alonso, Elisa Isabel 
dc.date.accessioned2021-01-08T08:33:03Z
dc.date.available2021-01-08T08:33:03Z
dc.date.created2020
dc.date.issued2021-01-08
dc.identifier.urihttps://hdl.handle.net/10630/20666
dc.descriptionShotgun Presentationes_ES
dc.description.abstractMercury 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.es_ES
dc.description.sponsorshipUniversidad de Málaga. Campus de Excelencia Internacional Andalucía Tech Fondos Feder y Junta de Andalucía Proyecto UMA18-FEDERJA-060 Plan Propio, Proyecto Puente, Universidad de Málagaes_ES
dc.language.isoenges_ES
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.subjectAguas marinas-Contaminaciónes_ES
dc.subjectMercurio-Residuoses_ES
dc.subject.otherUltra-tracees_ES
dc.subject.otherMercuryes_ES
dc.subject.otherMDSPEes_ES
dc.subject.otherCV-GFAASes_ES
dc.titleDetermination of mercury in sea waters by magnetic dispersive solid phase extraction prior to quantitation by FI-CV-GFAASes_ES
dc.typeinfo:eu-repo/semantics/conferenceObjectes_ES
dc.centroFacultad de Cienciases_ES
dc.relation.eventtitle4 th International Caparica Christmas Conference on Sample Treatment 2020es_ES
dc.relation.eventplaceCaparica (Portugal)es_ES
dc.relation.eventdateDel 30/11/2020 al 03/12/2020es_ES


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