Table 2: Elemental composition of HAs and FAs (all results are given for ash-free preparations).

Plot, horizons, and depthsAsh, %Weight portion, %
СHОN

Humic acids
Bolshoy Lyakhovsky, A 0–3 cm3,20 ± 0,1649,9 ± 1,65,6 ± 0,5 39,0 ± 5,05,6 ± 0,4
Bolshoy Lyakhovsky [H], buried2,16 ± 0,1149,6 ± 1,64,8 ± 0,4 42,0 ± 5,13,7 ± 0,3
Wrangel Island, A, 0–5 cm2,75 ± 0,1448,1 ± 1,55,0 ± 0,542,0, ± 3,24,9 ± 0,3

Fulvic acids
Bolshoy Lyakhovsky, A 0–3 cm1,44 ± 0,0740,4 ± 1,35,1 ± 0,552,1 ± 1,92,4 ± 0,4
Wrangel Island, A, 0–5 cm2,06 ± 0,1042,2 ± 1,45,2 ± 0,549,7 ± 6,43,0 ± 0,2