https://pubmed.ncbi.nlm.nih.gov/35377366/
Quantification of Humic and Fulvic Acids in Humate Ores, DOC, Humified Materials and Humic...
The purpose of this method is to provide an accurate and precise concentration of humic (HA) and/or fulvic acids (FA) in soft coals, humic ores and shales,...