¹³C NMR and ESR Characterization of Humic Substances Isolated from Soils of Two Siberian Arctic Islands

Table 5

Paramagnetic features of HAs and FAs.

Plot	Horizon, and depth, cm	Humic acids		Fulvic acids
		Mass concentration of free radical, 10^15 sping^−1	-factor	Mass concentration of free radical, 10^15 sping^−1	-factor
Bolshoy Lyakhovsky	A 0–3	2,25	2,0032	2,13	2,0037
Bolshoy Lyakhovsky	H	0,85	2,0034	0,86	2,0032
Wrangel Island	A 0–5	1,78	2,0033	3,87	2,0034