title: Determination of bromothalonil residues and degradation in apple and soil by QuEChERS and GC-MS/MS.
abstract: The dissipation and residues of bromothalonil in apple and soil under field condition were analyzed by QuEChERS (quick, easy, cheap, effective, rugged and safe) combined with gas chromatography-mass spectrometer method. The recoveries were ranged from 80.8 % to 106 % with coefficient variation for repeatability ranged from 3.08 % to 7.09 % at fortification levels of 0.02, 0.04 and 0.2 mg/kg in apple and soil. The limit of quantification of the method was 0.31 μg/kg. The dissipation rates of bromothalonil followed the first-order kinetics and the half-lives were from 3.61 to 3.98 days in apple and from 4.65 to 9.29 days in soil. In apple, the terminal residues of bromothalonil were below the China maximum residue limit (0.2 mg/kg) after 7 days of application. This work contributed to provide the basic information for a safe usage of bromothalonil in apple orchard and preventing health problem from consumers in China.
authors.affiliation: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD, 18, Haidian District, Beijing, 100085, China.
authors.forename: Huijun
authors.initials: H
authors.lastname: Liu
authors.forename: Baoyuan
authors.initials: B
authors.lastname: Guo
authors.forename: Huili
authors.initials: H
authors.lastname: Wang
authors.forename: Jianzhong
authors.initials: J
authors.lastname: Li
authors.forename: Lin
authors.initials: L
authors.lastname: Zheng
mesh_terms: D002681:China; D008401:Gas Chromatography-Mass Spectrometry; D006207:Half-Life; D007700:Kinetics; D027845:Malus / Q000737:chemistry*; D009570:Nitriles / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis*; D053719:Tandem Mass Spectrometry
chemical_list: D009570:Nitriles; D010573:Pesticide Residues; D012987:Soil; D012989:Soil Pollutants; C039411:1,2-dibromo-2,4-dicyanobutane