STUDY OF CYPERMETHRIN RESIDUE IN OKRA LEAVES AND FRUITS ASSESSED BY GC

The use of pesticides in agriculture concern of residue which may affect on human health. Cypermethrin is a relatively toxic and it is used to control moth pests of fruits and vegetable crops. As a consequence pesticide residue can be found in okra fruits and leaves. GC analytical performance were good ,low limit of detection. Instrumental methods are generally more sensitive and selective than the classical methods. Gas chromatography is one of the most powerful method and is used for determination of cypermethrin residue. Cypermethrin were selected in okra leaves and fruits. Cypermethrin were applied separately in three different concentrations i.e .50ppm, 75ppm, 100ppm on okra crops .Extraction of leaves and fruits were done by using solvent mixture Petroleum Ether: Acetone(9:1)by standard method and is estimated by GC. In the present conditions gas chromatography is most frequently used for residue analysis .After the application of Cypermethrin on okra crop the residue were determined 0,1,3,57,9,11,13,15,17,19 and 21 days after application. The results indicate that the residue below the detectable were found after 17 days. The purpose of the determination of cypermethrin residue is to consume these foods which contain pesticides at this level for their whole lives considered safe.