Effect of processing on pesticide residues in milk
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Date
2005
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Publisher
CCSHAU
Abstract
Pesticides resides in row milk was measured in samples collected
from farmer, vendor, local dairy and organic farm. The residue was found to be
above MRL in all the samples except those collected from organic farm. Whereas,
in the samples collected from organic farm most of the pesticides residues are even
not detected by GLC.
Pesticides residues were also measured & compared in processed
milk samples. Two types of processing that was heat treatment & fat reduction was
done. In heat treatment partial reduction in the pesticides residues was observed
after boiling, whereas no effect on pesticide residues was noticed on
pasteurization. But, fat removal shows a large reduction in the pesticide residues.
Milk samples whose fat percentage was adjusted to 4.5% shows reduction upto 30
per cent as compared to raw milk. While in the milk sample whose fat was further
reduced to 3 per cent was showing a reduction upto 83 per cent, most of the
pesticides residues are undetectable on GLC after reduction of fat level to 1.5 per
cent.