Dixit, V.P.Tyagi, Amit2020-01-032020-01-032007-05http://krishikosh.egranth.ac.in/handle/1/5810139293In the present study, about 168 tissue samples were analyzed for the presence of endosulfan and chlorpyrifos residues and 74 for presence of monocrotophos using the standardized method. The residues were extracted by treating with acetonitirile followed by liquid-liquid partition with sodium sulfate solution (2.5%): dichloromethane. The extracts obtained after dehydration on sodium sulfate column were cleaned up by performing adsorption chromatography on alumina column. The detection and quantification of these residues was carried out with the help of High Performance Liquid Chromatography using Diode Array Detector. Five (7.14 %) out of 70 muscle, 2 (2.85 %) of 70 liver and none of 70 kidney tissues were detected positive for endosulfan α residues. Out of these none of the samples violated the prescribed limits given by CODEX. Only one (1.42 %) of muscle tissue sample out of 70 was detected positive for endosulfan β residues. Out of these also none of the samples violated the prescribed limits given by CODEX. Seven (10.00 %) of muscle tissue, 6 (8.57 %) of kidney and 2 (2.85 %) of liver were detected positive for endosulfan sulfate residues. Out of these total samples none of the samples violated the prescribed limits given by CODEX. Chlorpyrifos residues were detected in 5 (7.14 %) of 70 muscle samples, 4 (5.71 %) of 70 liver and none of kidney tissue was detected positive. None of these samples also violated the prescribed limits given by CODEX. All of the 121 samples analyzed for presence of monocrotophos were found negative.ennullThesis