RESUMEN
One hundred bovine thigh muscle samples were examined for detection of diethyistilboesterol residues using spectrophotometric technique. Extraction of the samples was carried out according to the method recommended by Umberger et al [1963]. Diethylstilboesterol standard solution was prepared at concentration 2011/mi. For preparation of the working solution for spectrophotometric method 25m1 from the prepared solution were mixed with 18% potasium monohydrogen phosphate solution [V/V]. Finally the assay solution required for spectrophotometric method was prepared as well as the iradiation steps. Each sample extraction was measured and calculated. The obtaited results revealed that all samples were free from diethylistilboesterole residues. The results were discussed