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A series of structural features of the three main humic fractions (humic acid, fulvic acid and humin) from different depths of a peat bog deposit in Mazagon (Huelva, Southern Spain) were isolated and analysed by flash pyrolysis-gas chromatography-mass spectrometry, solid-state 13 C-nuclear magnetic resonance and Fourier transformed infrared spectroscopy. Such techniques demonstrate that...
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