Assessment of total arsenic and arsenic species stability in alga samples and their aqueous extracts

Garcia Salgado, Sara; Quijano Nieto, M. Angeles y Bonilla Simon, M. Milagros (2008). Assessment of total arsenic and arsenic species stability in alga samples and their aqueous extracts. "Talanta", v. 75 (n. 4); pp. 897-903. ISSN 0039-9140. https://doi.org/10.1016/j.talanta.2007.12.031.

Descripción

Título: Assessment of total arsenic and arsenic species stability in alga samples and their aqueous extracts
Autor/es:
  • Garcia Salgado, Sara
  • Quijano Nieto, M. Angeles
  • Bonilla Simon, M. Milagros
Tipo de Documento: Artículo
Título de Revista/Publicación: Talanta
Fecha: Mayo 2008
Volumen: 75
Materias:
Palabras Clave Informales: Alga; Arsenic stability; High performance liquid chromatography; Hydride generation; Inductively coupled plasma atomic emission spectroscopy
Escuela: E.U.I.T. Obras Públicas (UPM) [antigua denominación]
Departamento: Ingeniería Civil: Hidráulica y Energética [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

In order to achieve reliable information on speciation analysis, it is necessary to assess previously the species stability in the sample to analyse. Furthermore, in those cases where the sample treatment for species extraction is time-consuming, an assessment of the species integrity in the extracts is of paramount importance. Thus, the present paper reports total arsenic and arsenic species stability in alga samples (Sargassum fulvellum and Hizikia fusiformis), as well as in their aqueous extracts, which were stored in amber glass and polystyrene containers at different temperatures. Total arsenic determination was carried out by inductively coupled plasma atomic emission spectroscopy (ICP-AES), after sample acid digestion in a microwave oven, while arsenic speciation was conducted by anion exchange high performance liquid chromatography on-line coupled to ICPAES, with and without sample introduction by hydride generation (HPLC-ICP-AES and HPLC-HG-ICP-AES), after aqueous microwave-assisted extraction. The results obtained for solid alga samples showed that total arsenic (for Hijiki alga) and arsenic species present (As(V) for Hijiki and NIES No. 9 Sargasso) are stable for at least 12 months when samples are stored in polystyrene containers at +20 ◦C. On the other hand, a different behaviour was observed in the stability of total arsenic and As(V) species in aqueous extracts for both samples, being the best storage conditions for Sargasso extracts a temperature of −18 ◦C and polystyrene containers, under which they are stable for at least 15 days, while Hijiki extracts must be stored in polystyrene containers at +4 ◦C in order to ensure the stability for 10 days.

Más información

ID de Registro: 2269
Identificador DC: http://oa.upm.es/2269/
Identificador OAI: oai:oa.upm.es:2269
Identificador DOI: 10.1016/j.talanta.2007.12.031
URL Oficial: http://www.sciencedirect.com/science/journal/00399140?oldURL=y
Depositado por: Memoria Investigacion
Depositado el: 12 Feb 2010 12:04
Ultima Modificación: 20 Abr 2016 12:01
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