RESUMEN
Milk Powder is used in Egypt as infant food and also for adults. Contamination of milk powder with organochlorine pesticide residues was investigated in samples collected from the markets which belong to different producers. Hexachlorocyclohexane alpha and beta isomers and p, p/ DDE- residues were found to contaminate all milk powder samples with concentrations ranged between 0.36-0.81 ppb, 4.76-9.19 ppb and 0.84-6.11 ppb respectively when the milk powder was diluted with tap water and between 0.23-0.95 ppb, 4.76-11.91 ppb and 1.24-6.24ppb respectively when diluted with boiled water. Analysis of tap water and boiled water results indicated the presence of low concentrations of organochlorine pesticide residues. Some of which decreased by the thermal treatment i.e. alpha HCH from 0.013 to 0.003 ppb, dieldrin from 0.054 to 0.004 ppb and non significant p, p/ DDE from 0.100 to 0.089 ppb. While beta HCH showed opposite pattern as its residues increased from 0.153 to 0.439 ppb after boiling the water. Some of the milk powder studied are specified as babies and infant food. Daily intake of detected contaminants was calculated and referred to their Acceptable Daily Intake [ADI]