AI Article Synopsis
- Rainwater has low concentrations of dissolved organic matter (DOM), making effective extraction methods crucial for its characterization.
- A comparison of extraction procedures using DAX-8 and C-18 sorbents revealed that C-18 is generally more effective, recovering a higher percentage of rainwater DOM.
- C-18 better concentrated protein-like compounds, while both methods effectively concentrated humic-like compounds; however, C-18 extraction provided a more representative sample of the overall rainwater DOM.
Article Abstract
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.
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| http://dx.doi.org/10.1016/j.talanta.2010.09.050 | DOI Listing |
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