الفهرس 
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Abstract
A total of eighty random samples of liver, kidney, gizzard and muscle of twenty aged pekein ducks (males and females)which reared in farms from Fakous and KafrSakr in Sharkia.The samples were collected in polyethylene bags, all of which were kept in ice box and transferred immediately to the meat hygiene laboratory, Faculty of Veterinary Medicine, Zagazig University. The samples were then analyzed to estimate the level of Pb, Cd, Cu, Zn, As and Cr by Atomic Absorption Spectrometry (AAS).(1) Lead (Pb):The results recorded in table (1) show that the mean values±SE of lead in female ducks from Fakous area are1.16 ± 0.18, 1.16 ± 0.13, 0.68 ± 0.19 and 0.42 ± 0.14ppm in livers, kidney, gizzard and muscle samples respectively while in male ducks are 0.56 ± 0.10, 0.74 ± 0.09, 0.28 ± 0.05 and 0.23 ± 0.02ppm, respectively, but in KafrSakr area the mean values of lead in female ducks are 0.86 ± 0.11, 1.16 ± 0.22, 0.76 ± 0.12 and 0.53 ± 0.11 ppm in liver, kidney, gizzard and muscle samples respectively while in male ducks are 0.41 ± 0.08, 0.50 ± 0.09, and 0.21 ± 0.03and 0.13 ± 0.02 ppm in these tissues respectively.It is cleared that 45 of analyzed samples (45%) are over the permissible limits of lead levels Also, the lead concentration affected by sex and type of the organ (Table 2)After treatment:The mean values of leadafter treatment muscle samples with acetic acid 1%, acetic acid 4%, sodium chloride 1%, sodium chloride 4%, sodium.