Monitoring of certain pesticide residues in raw milk samples collected from different markets at Qalubia governorate,Egypt [electronic resource].

Includes references.

Monitoring of pesticide residues was carried out in milk samples collected from six markets at QaIubia governorate through four seasons within the year 2001. The detected pesticide residues were including organochlorine pesticides (DDT derivatives, hexachlorocyclohexane and cyclodienes) and non-organochlorine pesticides (organophosphorus, pyrethroids and others). Generally, for the organochlorine pesticide residues, the total mean ofo,p '-DOE andp,p'-DOE in summer samples reached to 0.98 and 1.02 ppm, respectively. In autumn samples, the total mean ofo,p '-DOE and O,p '-DDT reached to 0.57 and 0.84 ppm, respectively. As for hexachlorocyClohexane and/or cyclodiene compounds, milk samples collected at the summer season were the highest samples in their content of such residues, especially, endrin (0.90 ppm) followed by a.-HeH (0.37 ppm), aldrin (0.32 ppm) and heptachlor (0.24 ppm). In addition, El-Kanater market followed by Toukh and Qaba were the higher markets that their samples contained the higher residues oforganochlorine pesticide residues, especially at the Sununer season followed by the autumn. For the nonorganochlorine pesticide residues, ten pesticide residues were detected. The milk samples collected at the summer season were containing the higher concentration (as total mean) especially that from markets ofQaha (0.55 ppm) followed by El-Kanater (0.46 ppm),Shoubra (0.28 ppm) and Toukh (0.22 ppm) compared with the other seasons. Generally, the concentrations of the detected pesticide residues were higher than the published Maximum Residue Limits (MRL). In addition, the obtained data showed that hexachlorocyclohexane and cyclodiene compounds exhibited the higher percent of positive frequencies (14.46 %) followed by the non-organochlorine pesticides (11.03 %) while DDT derivatives were the lower frequent compounds (7.90 0/0) in the collected milk samples.

Summary in Arabic.

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