Fig. 5. Tetramethylammonium hydroxide (TMAH) thermochemolysis-GC/MS selective ion chromatogram (74 m/z) of humic acids (HAs) from <2 µm soil aggregate-size fraction (FAME, fatty acid methyl ester; DAME, dicarboxylic acid dimethyl ester).
Fig. 5. Tetramethylammonium hydroxide (TMAH) thermochemolysis-GC/MS selective ion chromatogram (74 m/z) of humic acids (HAs) from <2 µm soil aggregate-size fraction (FAME, fatty acid methyl ester; DAME, dicarboxylic acid dimethyl ester).