title: Direct estimation of carbaryl by gas liquid chromatography with nitrogen phosphorus detection.
abstract: A simple and efficient analytical method was standardized for the estimation of residues of carbaryl in various substrates comprising grape berries, kinnow pulps, kinnow rind and soil. The samples were refluxed using mixture of methanol: 0.5 N HCl (1:1 v/v); diluted with brine solution, partitioned into chloroform and dried over anhydrous sodium sulfate. Further the samples were treated with anhydrous magnesium sulfate and primary secondary amine. Final clear extracts were concentrated under vacuum and reconstituted the volume into acetone. The residues were estimated directly on gas liquid chromatograph equipped with nitrogen phosphorus detection system equipped with a capillary column packed with 5 % diphenyl 95 % dimethyl polysiloxane non-polar phase. A consistent recovery from 82 % to 97 % for carbaryl was observed when samples were spiked at levels ranging from 0.05 to 1.00 mg kg(-1). The limit of quantification of the method was worked out to be 0.05 mg kg(-1) for grape berries, kinnow pulp, kinnow rind and soil.
authors.affiliation: Pesticide Residue Analysis Laboratory, Department of Entomology, Punjab Agricultural University, Ludhiana, 141004, Punjab, India. rsbattu2007@rediffmail.com
authors.forename: Raminderjit Singh
authors.initials: RS
authors.lastname: Battu
authors.forename: Kousik
authors.initials: K
authors.lastname: Mandal
authors.lastname: Urvashi
authors.forename: Suneet
authors.initials: S
authors.lastname: Pandher
authors.forename: Reenu
authors.initials: R
authors.lastname: Takkar
authors.forename: Balwinder
authors.initials: B
authors.lastname: Singh
mesh_terms: D012721:Carbaryl / Q000032:analysis*; D002849:Chromatography, Gas; D004784:Environmental Monitoring / Q000379:methods*; D004785:Environmental Pollutants / Q000032:analysis; D005638:Fruit / Q000737:chemistry; D007306:Insecticides / Q000032:analysis*; D009584:Nitrogen / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis; D010758:Phosphorus / Q000032:analysis*; D012987:Soil / Q000737:chemistry
chemical_list: D004785:Environmental Pollutants; D007306:Insecticides; D010573:Pesticide Residues; D012987:Soil; D010758:Phosphorus; D009584:Nitrogen; D012721:Carbaryl