title: Relative concentrations of polyaromatic primary amines and azaarenes in mutagenically active nitrogen fractions from a coal liquid.
abstract: Thin-layer chromatography (TLC) was used to separate components in the basic and tar fractions of solvent refined coal (SRC-I) process solvent (PS) to obtain materials suitable for biological and chemical analysis. Those fractions eluted from TLC plates which were mutagenically active in the Ames/Salmonella assay were analyzed by gas chromatographic mass spectrometry (GCMS) for polycyclic azaarenes, polyaromatic primary amines (PAA) and carbazoles. In all materials tested, a strong correlation was observed between the concentration of PAAs in a given TLC region and the mutagenicity of that region in the Ames assay system. Conversely, azaarenes having 2--4 fused rings and carbazoles were present in both mutagenic and non-mutagenic TLC eluates. No PAAs were detected in mutagenically inactive TLC eluates. In comparison to the mutagenic tar fractions, the PS basic fraction contained relatively larger concentrations of 2- and 3-ringed components such as aminonaphthalenes and aminoanthracenes or aminophenanthrenes. The tar fractions, which were essentially devoid of aminonaphthalenes, had a higher average molecular weight and contained relatively higher concentrations of aminopyrenes.
mesh_terms: D000588:Amines / Q000494:pharmacology*; D000818:Animals; D001372:Aza Compounds / Q000494:pharmacology*; D001711:Biotransformation; D002855:Chromatography, Thin Layer / Q000379:methods; D003031:Coal; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D008297:Male; D008862:Microsomes, Liver / Q000378:metabolism; D009152:Mutagenicity Tests; D009153:Mutagens; D009154:Mutation; D011083:Polycyclic Compounds / Q000494:pharmacology*; D011721:Pyrenes / Q000494:pharmacology; D051381:Rats; D011919:Rats, Inbred Strains; D012486:Salmonella typhimurium / Q000187:drug effects; D013329:Structure-Activity Relationship
chemical_list: D000588:Amines; D001372:Aza Compounds; D003031:Coal; D009153:Mutagens; D011083:Polycyclic Compounds; D011721:Pyrenes