title: Dissipation behavior and risk assessment of acephate in brinjal using GLC with FPD.
abstract: A study was conducted to observe the persistence, dissipation behavior, and risk assessment of acephate on brinjal fruit. Brinjal crop was sprayed with acephate 75 SP at 560 and 1120 g a.i. ha(-1) at fruiting stage followed by another application at 10-day interval. After sampling, the samples were extracted and cleaned up using quick, easy, cheap, effective, rugged, and safe (QuEChERS) technique, and the residues of acephate were analyzed with gas chromatography using flame photometric detector (FPD). The average initial deposits of acephate on brinjal fruits were found to be 2.54 and 4.07 mg kg(-1) following application of insecticide at 560 and 1120 g a.i. ha(-1), respectively. Residues of acephate reached below determination level of 0.10 mg kg(-1) after 7 days at recommended dosages and after 10 days at double the recommended dosages. The half-life of acephate was found to be 1.55 and 1.52 days, respectively, at 560 and 1120 g a.i. ha(-1). For risk assessment studies, theoretical maximum residue contributions (TMRC) were calculated and compared with maximum permissible intake (MPI). It was observed that TMRC values reached below MPI in 0-day samples at both recommended and double the recommended dosages. Therefore, it was concluded that if waiting period of 1 day is observed, there will be much reduced risk to consumers and the insecticide could be safely used for the protection of brinjal crop from insect pests.
authors: Pesticide Residue Analysis Laboratory, Department of Entomology, Punjab Agricultural University, Ludhiana, 141004, Punjab, India.
authors: Ramandeep
authors: R
authors: Kaur
authors: Sarabjit
authors: S
authors: Kaur
authors: Kousik
authors: K
authors: Mandal
authors: Balwinder
authors: B
authors: Singh
mesh_terms: D002849:Chromatography, Gas; D004784:Environmental Monitoring / Q000379:methods; D005638:Fruit / Q000737:chemistry; D006207:Half-Life; D007306:Insecticides / Q000032:analysis*; D009946:Organothiophosphorus Compounds / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis; D063088:Phosphoramides; D018570:Risk Assessment / Q000379:methods; D032323:Solanum melongena / Q000737:chemistry*
chemical_list: D007306:Insecticides; D009946:Organothiophosphorus Compounds; D010573:Pesticide Residues; D063088:Phosphoramides; C001969:acephate
references: Environ Monit Assess. 2010 Jun;165(1-4):685-92
references: 19496002
references: Environ Monit Assess. 2013 Sep;185(9):7935-43
references: 23456274
references: J AOAC Int. 2003 Mar-Apr;86(2):412-31
references: 12723926
references: J Environ Sci Health B. 2007 Jun-Jul;42(5):481-90
references: 17562455
references: Pest Manag Sci. 2009 Feb;65(2):189-96
references: 18979521
references: Bull Environ Contam Toxicol. 2011 Jan;86(1):101-4
references: 21107525
references: J AOAC Int. 2005 Mar-Apr;88(2):595-614
references: 15859089
references: J AOAC Int. 2007 Mar-Apr;90(2):485-520
references: 17474521
references: Bull Environ Contam Toxicol. 2009 Jan;82(1):124-8
references: 18777148
references: Food Addit Contam. 2000 Oct;17(10):855-8
references: 11103269