Abstract: In this study, the distribution of organically bound forms of selenium in Se-rich peanuts was analyzed by determining the amounts of total, protein-bound, polysaccharide-bound and fat-bound selenium. Protein-bound selenium was the most predominant bound form in Se-rich peanuts, accounting for 69.29% of the total selenium amount, and alkali-soluble protein was the most prominent form among five types of soluble proteins, representing 45.19% of the total selenium amount. Polysaccharide ranked second among three organically bound forms, with a content of 11.76% relative to the total selenium amount. Fat-bound selenium accounted for only 8.61%.

Key words: peanuts, protein-bound Se, polysaccharide-bound Se, fat-bound Se, speciation