Utilize este identificador para referenciar este registo:
http://hdl.handle.net/10773/28372
Título: | Comparison between DAX-8 and C-18 solid phase extraction of rainwater dissolved organic matter |
Autor: | Santos, Patrícia S. M. Otero, Marta Filipe, Olga M. S. Santos, Eduarda B. H. Duarte, Armando C. |
Palavras-chave: | Rainwater DOM DAX-8 resin C-18 sorbent UV–visible spectroscopy Fluorescence spectroscopy |
Data: | 15-Dez-2010 |
Editora: | Elsevier |
Resumo: | Rainwater is a very low concentrated matrix and, for dissolved organic matter (DOM) characterization, an efficient extraction procedure is essential. Isolation procedures based on the adsorption onto XAD-8 and C-18 sorbents have been used in the literature for rainwater DOM isolation, but a comparison between these procedures is lacking. In this work, UV-visible and molecular fluorescence spectroscopies highlighted differences between rainwater DOM isolated by DAX-8 (replacement for XAD-8) and by C-18. It was possible to recover higher rainwater DOM percentage by the C-18 based procedure than by the DAX-8 one. Rainwater protein-like compounds were better concentrated by the C-18 procedure than by the DAX-8 one, while humic-like compounds were similarly concentrated by both procedures. Furthermore, rainwater DOM extracted by the C-18 procedure was more representative of the global matrix, while DAX-8 preferentially extracted humic-like compounds. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/28372 |
DOI: | 10.1016/j.talanta.2010.09.050 |
ISSN: | 0039-9140 |
Aparece nas coleções: | CESAM - Artigos DQ - Artigos |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Santos et al. - 2010 - Comparison between DAX-8 and C-18 solid phase extr.pdf | 415.91 kB | Adobe PDF |
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