2026-06-01T19:48:58Zhttps://riuma.uma.es/rest/oai/requestoai:riuma.uma.es:10630/227402026-02-03T11:22:21Zcom_10630_2254col_10630_37953
RIUMA. Repositorio Institucional de la Universidad de Málaga
author
Montoro-Leal, Pablo
author
García-Mesa, Juan Carlos
author
Morales-Benítez, Irene
author
García-de-Torres, Amparo
author
Vereda-Alonso, Elisa Isabel
2021-08-25T09:08:38Z
2021-08-25T09:08:38Z
2021
Talanta 235 (2121) 122769
https://hdl.handle.net/10630/22740
https://doi.org/10.1016/j.talanta.2021.122769
A novel magnetic functionalized material based on graphene oxide and magnetic nanoparticles (MGO) was used to develop a magnetic solid phase extraction method (MSPE) to enrich both, inorganic and organic arsenic species in environmental waters and biological samples. An automatic flow injection (FI) system was used to preconcentrate the arsenic species simultaneously, while the ultra-trace separation and determination of arsenobetaine (AsBet), cacodylate, AsIII and AsV species were achieved by high performance liquid chromatog raphy combined with inductively coupled plasma mass spectrometry (HPLC-ICP-MS). The sample was introduced in the FI system where the MSPE was performed, then 1 mL of eluent was collected in a chromatographic vial, which was introduced in the autosampler of HPLC-ICP-MS. Therefore, preconcentration and separation/deter mination processes were automatic and conducted separately. To the best of our knowledge, this is the first method combining an automatic MSPE with HPLC-ICP-MS for arsenic speciation, using a magnetic nanomaterial based on MGO for automatic MSPE. Under the optimized conditions, the LODs for the arsenic species were 3.8 ng L− 1 AsBet, 0.5 ng L− 1 cacodylate, 1.1 ng L− 1 AsIII and 0.2 ng L− 1 AsV with RSDs <5%. The developed method was validated by analyzing Certified Reference Materials for total As concentration (fortified lake water TMDA 64.3 and seawater CASS-6 NRC) and also by recovery analysis of the arsenic species in urine, well-water and seawater samples collected in Malaga. ´ The developed method has shown promise for routine monitoring of arsenic species in environmental waters and biological fluids.
eng
Materiales magnéticos
Grafeno
Nanopartículas
Semiautomatic method for the ultra-trace arsenic speciation in environmental and biological samples via magnetic solid phase extraction prior to HPLC-ICP-MS determination
journal article
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URL
https://riuma.uma.es/bitstreams/26dfddd2-059f-4dbd-aca7-c6800a05337a/download
File
MD5
3887469312fa6738d354cc353c3a8401
3982530
application/pdf
As MSPE-HPLC-ICP-MS.pdf