Reduced complexity of multidimensional and diffusion NMR spectra of soil humic fractions as simplified by Humeomics

Chemical and Biological Technologies in Agriculture

Table 2 ¹H diffusion values (10 ⁻¹¹ m ² s ⁻¹at 25°C) for signals resonating in aromatic (9.0 to 6.5 ppm), hydroxyalkyl (4.4 to 2.5 ppm), and alkyl (2 to 0.5 ppm) spectral regions

Samples	Aromatic region	Hydroxyalkyl region	Alkyl region
RES4	3.7	5.9	4.8
F1	4.1	7.0	2.1
F2	6.3	7.4	2.7
F3	7.7	9.6	2.9
F4	5.6	7.2	2.9
F5	5.2^a	7.4	2.5
F6	18.3	25.4	2.6

^aThe reported value was obtained by excluding the contribute of signals at 7.3, 7.8, and 8.4 ppm, for which the average diffusion value resulted to 9.0.