Eight corn. available and recovered vegetable oils (flax, false flax, evening primrose, barage, blackcurrant, mustard, tung and pot marigold) were analyzed for chem. compn., esp. for content of mono, di and tri unsatd. fatty acids. Contents of conjugated linoleic acids in tung oil were: the isomer 9c,11t,13t (alpha-eleostearic acid) 76.8% and the isomer 9c,11t,13t (beta-eleostearic acid) 1.3% of the total fatty acids. In the marigold oil (varieties 'Geisha Girl' and 'Persemmon Beauty'), the isomer 8t,10t,12c (alpha-calendic acid) was in concns. 53,2 and 53,6%, resp. Concns. of the isomer 8t,10t,12t (beta-calendic acid) were 2,1% and 1,4%, resp. alpha-Linolenic acid (9c,12c,15c C18:3) was identified in linseed oil (53,3%), in Camelina sativa oil (45,7% m/m) and in low erucic acid mustard oil (13,9% m/m). gamma-Linolenic acid (6c,8c,12c C18:3) was identified in evening primrose oil (6,8% m/m), in borage seed oil (20,6% m/m) and in black currant seed oil (10,4%). In black currant oil, the stearidonic acid (C18:4) was also found. The linseed, false flax, tung and pot marigold oils were selected as raw materials for recovery or prodn. of conjugated linoleic acids with biolog. activity.