This investigation was conducted to determine the levels of aflatoxins, ochr'atoxin A and zearalenone in feeds and feedstuffs obtained from various regions of Turkey.

Samples were analysed by thin layer chromatography. In this method, mycotoxinis were extracted with chloroform from materials and then tranfered through the sep-pak cardrige coloumn to elute the mycotoxins residues.

Mycotoxins were found in the nine samples of a hundred materials analysed. Aflatoxin B! in two samples, ochratoxin A in five samples and zearalenone in three samples were determined. The average concentrations of aflatoxin B₁, ochmtoxin A and zearalenone were 3.75., 12 and 6,6 microgram/kg respectively. The detectalble limits were 1 microgram/kig for aflatoxin, 2 microgram/kg for ochratoxin A and 4 microgram,/kg for zearalenone.

According to results, the levels mycotoxins determined in the samples will not cause an extremely cases, however would make residue problems with consumption of these feeds ;by the animals for a long periods.