Structural characterization using 2D NMR spectroscopy and TMAH-GC × GC-MS: Application to humic acids from soils of an integrated agricultural system and an Atlantic native forest

Amanda Maria Tadini, Aleksandar I. Goranov, Ladislau Martin‐Neto, A. C. de C. Bernardi, P. P. A. Oliveira, José Ricardo Macedo Pezzopane, Patrick G. Hatcher