INDIRECT COMPETITIVE ELISA FOR THE QUANTITATIVE AND QUALITATIVE-ANALYSIS OF ALDRIN DIELDRIN IN EGYPTIAN MILK SAMPLES FROM DIFFERENT FARM ANIMAL SPECIES/

The development of a simple, indirect, competitive ELISA is described for the detection and quantification of aldrin/dieldrin in Egyptian mi lk samples obtained from farm animals of different species used in dai ly production in Egypt (buffalo, cow, goat and sheep) and from donkey milk. Milk samples (53) were collected from 18 stations in 16 differen t governorates in Egypt. The detection limit for aldrin/dieldrin in mi lk was 10 ppb-5 ppm without enhancement. Aldrin/dieldrin was detected in the following number of milk samples: buffalo, 62.5% (10/16); cow, 73.33% (11/15); goat, 66.66% (8/12); sheep, 71.428% (5/7); and donkey, 66.66% (2/3). The values reflect the lipophilic nature of these pesti cides. The assay is rapid, sensitive, simple to perform and excellent for screening.