Influence of extractants and filter materials in the extraction of dissolved organic matter (DOM) from subtropical agricultural soil
| Autor: | Yirong Su Jinshui Wu, Yajun Hu Chengming Liang, Xiangbi Chen Xiaodong Zheng |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Aqueous solution
010504 meteorology & atmospheric sciences Filter paper Chemistry Extraction (chemistry) 010501 environmental sciences Mass spectrometry 01 natural sciences Applied Microbiology and Biotechnology Filter (aquarium) Environmental chemistry Dissolved organic carbon Animal Science and Zoology Composition (visual arts) Agronomy and Crop Science Chemical composition 0105 earth and related environmental sciences Food Science |
| Zdroj: | Emirates Journal of Food and Agriculture. :165 |
| ISSN: | 2079-0538 2079-052X |
| DOI: | 10.9755/ejfa.2018.v30.i3.1635 |
| Popis: | The dissolved organic matter (DOM) plays an important role in ecological processes in agricultural ecosystems. However, composition of DOM extracted by different methods remains unclear. In this study, pyrolysis–gas-chromatography/mass spectrometry (Py-GCMS) was used to investigate the content and chemical composition of DOM extracted by aqueous K2SO4 or H2O and filter paper (FP) or membrane (FM). The results showed that dissolved organic carbon (DOC) content extracted by K2SO4 was 0.83–11.2 times higher than that extracted by H2O, while it increased by 10.1–75.0% when filtered by FP compared to that filtered by FM. Compared with the H2O extract, the K2SO4 one contained lower proportions of aromatic compounds. The relative proportions of hydrophobic compounds in the K2SO4 extract (9.7–89.7%), were higher than in H2O one (2.6–63.5%), whereas the proportions of hydrophilic compounds exhibited the opposite trend (p |
| Databáze: | OpenAIRE |
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