Isolation and Identification of Fatty Acid Amides from Shengli Coal

Abstract

Shengli coal, a Chinese brown coal, was extracted with carbon disulfide and the extract was gradiently eluted with <i>n</i>-hexane and ethyl acetate (EA)/<i>n</i>-hexane mixed solvents with different concentrations of EA in a silica gel-filled column. A series of fatty acid amides, including fourteen alkanaimdes (C₁₅−C₂₈) and three alkenamides (C₁₈ and C₂₂), were isolated from the coal by this method and analyzed with a gas chromatography/mass spectrometry