ESTROGEN RESIDUES IN IMPORTED FROZEN MEAT

1600 imported frozen meat and 400 fat samples from various European an d American countries and 200 chicken samples from Beni-Suef modern aba ttoir were examined between 1987 and May 1990. Oestrogen residues were determined qualitatively and quantitatively using two methods (thin-l ayer chromatography and high performance liquid chromatography). In th e present investigations oestrogen residues were found in samples of i mported frozen meat and fat from Germany, the USA and Ireland during 1 987 but in 1988 the only positive result was from Ireland. Otherwise t he imported samples (meat and fat) had oestrogen levels that did not e xceed 0.05 ng/g tissue, but the chicken samples examined had levels hi gher than this throughout the whole experimental period.