Estimation of residues of carbofuran and its metabolites in sugarcane and soil by derivatization with 1-fluoro-2,4-dinitrobenzene and gas chromatography with nitrogen-phosphorus detection.
Residues of carbofuran and its metabolites were studied in sugarcane plants and soil after application at 1 and 2 kg/ha. The residues of carbofuran and its metabolites were extracted by refluxing with 0.25N HCI, partitioned into dichloromethane, and cleaned up on acidic alumina. The respective 7-phenols of carbofuran, 3-ketocarbofuran, and 3-hydroxycarbofuran were destroyed by treatment with ceric ammonium sulfate, and the residues were derivatized with 1-fluoro-2,4-dinitrobenzene. The derivatives were estimated by gas chromatography with nitrogen-phosphorus detection. The concentration of 3-hydroxycarbofuran in sugarcane plants remained higher and persisted longer than that of the parent compound. Carbofuran-derived residues were not detected in cane juice. Soil samples were found to contain only carbofuran, which declined at a very fast rate that followed a first-order kinetics rate of reaction.
Battu
R
R
Department of Entomology, Punjab Agricultural University, India.
Kalra
R L
RL
Dhillon
R S
RS
D002235:Carbofuran / Q000032:analysis*; D002849:Chromatography, Gas / Q000379:methods*; D004139:Dinitrofluorobenzene; D007306:Insecticides / Q000032:analysis*; D007700:Kinetics; D009584:Nitrogen / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D010936:Plant Extracts / Q000737:chemistry*; D010945:Plants, Edible / Q000737:chemistry*; D012987:Soil
D007306:Insecticides; D010936:Plant Extracts; D012987:Soil; D010758:Phosphorus; D004139:Dinitrofluorobenzene; D009584:Nitrogen; D002235:Carbofuran