Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Arsenic speciation in edible marine algae: presence of water and lipid-soluble arsenic compounds
Year:2016
Research Areas
  • Analytic chemistry,
  • Owning and treatment sample,
  • Atomic spectrometry,
  • Chromatography,
  • Molecular spectromety
Information
Abstract
Nowadays, there is considerable interest in arsenic speciation in food products due to the different toxicity exhibited by the different arsenic compounds. This is accentuated in the case of marine algae, because they contribute substantial amounts of arsenic to the human diet and their consumption is increasing due to their properties as food additives, nutritional values and suggested medical applications. Organic arsenic compounds are abundant in marine ecosystems. Although most of the arsenic compounds identified so far have been water-soluble species, the early work on arsenic marine chemistry focused on lipid-soluble compounds. In 1988, an arsenolipid was first rigorously characterized and identified as an arsenosugar-containing phospholipid in algae. Subsequently, several arsenic-containing fatty acids and hydrocarbons have been discovered in different fish products, which origin was presumed to be algae. In this work, we report the water and lipid-soluble arsenic compounds found in nine commercially available edible marine algae from Japan and Spain. The extraction of water-soluble arsenic species was performed by microwave-assisted extraction, using deionized water as extracting agent, and they were determined by HPLC-(UV)-HG-AFS. Lipid-soluble arsenicals were extracted by mechanical shaking with a (2:1; v/v) chloroform/methanol mixture, purified by SPE on home-made silica columns and determined by on line HPLC-ICPMS/ESMS analysis. Six water-soluble arsenic species, comprising DMA, As(V) and four arsenosugars (glycerol, phosphate, sulfonate and sulfate sugars), as well as fourteen lipid-soluble arsenic species (three arsenic-containing hydrocarbons and eleven arsenosugar-containing phospholipids), were found in the water and chloroform extracts, respectively, of the edible marine algae analyzed.
International
Si
Congress
2nd International Conference and Expo on Separation Techniques
960
Place
Valencia (España)
Reviewers
Si
ISBN/ISSN
2157-7064
Start Date
26/09/2016
End Date
28/09/2016
From page
34
To page
34
2nd International Conference and Expo on Proceedings of Separation Techniques
Participants
  • Autor: Sara Garcia Salgado (UPM)
  • Autor: M. Angeles Quijano Nieto (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Tecnología de Materiales y Medio Ambiente
  • Departamento: Ingeniería Civil: Hidráulica y Ordenación del Territorio
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