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- W2046522166 abstract "The newly developed methodology of direct pyrolysis-field ionization mass spectrometry (Py-FIMS) is briefly described. The potential and limits for structural elucidation of thermally-evolved building blocks of aquatic and terrestrial humic substances are outlined. For interpretation Py-GC/MS, high mass resolution and complementary data from other spectroscopic as well as wet-chemical, microbiological, agricultural, ecological etc. data are essential. Seven humic acids (HAs) extracted from soils of widely differing peodology and geographic environments were characterized by chemical methods, 13C-NMR and Py-FIMS. The major building blocks of all HAs were found to be phenolics, lignin monomers and dimers. In addition to mono- and polysaccharides and N-components, C12C26 n-alkanes, C11C33 n-fatty acids and C34C48 n-alkyl monoesters were also found to be present. In particular, the capacity for direct analysis of whole soils opens promising opportunities for the characterization of main chemical constituents of soil organic matter on a molecular basis." @default.
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- W2046522166 date "1992-05-01" @default.
- W2046522166 modified "2023-10-14" @default.
- W2046522166 title "A contribution to solving the puzzle of the chemical structure of humic substances: pyrolysis-soft ionization mass spectrometry" @default.
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- W2046522166 doi "https://doi.org/10.1016/0048-9697(92)90070-9" @default.
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