English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/3063
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


Rapid and quantitative release, separation and determination of inorganic arsenic [As(III) plus As(V)] in seafood products by microwave-assisted distillation and hydride generation atomic absorption spectrometry

AuthorsMuñoz, Ociel; Vélez, Dinoraz ; Cervera, María Luisa; Montoro, Rosa
KeywordsInorganic arsenic
Atomic absorption spectrometry
Issue Date1999
PublisherRoyal Society of Chemistry (UK)
CitationJournal of Analytical Atomic Spectrometry 14 (10) : 1607-1613 (1999)
AbstractA precise, simple and rapid method is described for the determination of inorganic arsenic [As(iii)+As(v)] in seafood products. The inorganic species were isolated from the matrix by microwave-assisted distillation and determined by hydride generation atomic absorption spectrometry (HGAAS). The microwave and chemical parameters were optimized in order to obtain quantitative inorganic arsenic recoveries. The analytical features of the method are as follows: detection limit 10 ng g(-1) (dry mass) or 2 ng g(-1) (fresh mass); precision (RSD) 4%; recoveries 106 +/- 3% for As(iii) and 113 +/- 4% for As(v). Under the optimized conditions, arsenobetaine, arsenocholine and tetramethylarsonium ion added to samples of seafood were not distilled; however, minor species were distilled and were detected in various percentages: 109% monomethylarsonic acid; 11% dimethylarsinic acid; 0.2% trimethylarsine oxide. The concentrations expressed as arsenic contributed by these species would imply a mean overestimate of inorganic arsenic of about 24 ng g(-1) dry mass (dm). The concentrations of inorganic arsenic found in natural seafood samples ranged between 0.053 and 1.145 mu g g(-1) (dm) (mean moisture content 78%). The procedure was compared with an alternative methodology in which acid digestion-solvent extraction-HGAAS was used for the determination of inorganic arsenic. A Student's t-test for paired samples of the data obtained by the two methodologies showed no significant differences (P -value 0.66).
Appears in Collections:(IATA) Artículos
Files in This Item:
There are no files associated with this item.
Show full item record
Review this work

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.