Document Type : Original Article
Authors
1
Food Science and Technology Dept., Fac. of Agric., Kafrelsheikh University, Egypt
2
Food Hygiene Researches Unit, Animal Health Research Institute, Kafrelsheikh , Egypt.
Abstract
Concentrations of heavy metals (Cu, Zn, Ni, Cd, Mn, Cr, Pb and Fe) were measured in sediment, water, table salt and muscles of fresh and salted grey mullet (Mugil cephalus) fish from different fish farms in Kafrelsheikh Governorate. The results referred that sediments from all regions contained high levels of heavy metals compared to literature. On the other hand, higher concentrations of Cd and Pb were recorded in all water samples compared to FAO, (1984). Water contents of heavy metals may be affected by sediment contamination. Heavy metal concentrations of table salt were lower than the maximum permissible limits set by EOSQC, (1993) with the exception of Zn, Cd and Pb which were the highest. As for heavy metal concentrations in grey mullet fish before salting generally, fish samples from Al Hamoul had the lowest concentrations of Mn and Fe; while the samples from Sidi salem had the lowest concentrations of Zn, Cd and Pb. The lowest concentrations of Cu and Ni was found in samples from Motobes; while Cr was the lowest in samples from El Reyad. But, these values are higher than the maximum permissible limits set by FAO/WHO (1989), EOSQC (1993), USFDA (1993) and EC (2001). After salting process for 4 weeks, the data reflected that, Cu, Cd, Mn, Cr and Pb decreased as a function of salting process. While, Zn, Ni and Fe increased as a function of salting process. These increment may be due to metal contamination of table salt.
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