title: Evaluation of pesticide residue dynamics in Chinese cabbage, head cabbage and cauliflower.
abstract: Pesticide residues from the time of application until harvest were analysed for 20, 17 and 18 active insecticidal and fungicidal substances in Chinese cabbage, head cabbage and cauliflower, respectively. In total, 40 mathematical models of residue degradation were developed using a first-order kinetic equation, and from these models it was possible to forecast the action pre-harvest interval for a given action threshold for low-residue production in Brassica vegetables as a percentage of the maximum residue level. Additionally, it was possible to establish an action pre-harvest interval based on an action threshold of 0.01 mg kg‒1for the production of Brassica vegetables for baby food. Among the evaluated commodities, the speed of residue degradation was highest in head cabbage, medium in Chinese cabbage and lowest in cauliflower. The half-lives of pesticide in various vegetables were also determined: they ranged from 1.55 to 5.25 days in Chinese cabbage, from 0.47 to 6.54 days in head cabbage and from 1.88 to 7.22 days in cauliflower.
authors.affiliation: a Division of Crop Protection and Plant Health , Crop Research Institute , Prague , Czech Republic.
authors.forename: František
authors.initials: F
authors.lastname: Kocourek
authors.affiliation: a Division of Crop Protection and Plant Health , Crop Research Institute , Prague , Czech Republic.
authors.forename: Jitka
authors.initials: J
authors.lastname: Stará
authors.affiliation: a Division of Crop Protection and Plant Health , Crop Research Institute , Prague , Czech Republic.
authors.forename: Kamil
authors.initials: K
authors.lastname: Holý
authors.affiliation: a Division of Crop Protection and Plant Health , Crop Research Institute , Prague , Czech Republic.
authors.forename: Tereza
authors.initials: T
authors.lastname: Horská
authors.affiliation: b Department of Food Analysis and Nutrition , Institute of Chemical Technology , Prague , Czech Republic.
authors.forename: Vladimír
authors.initials: V
authors.lastname: Kocourek
authors.affiliation: b Department of Food Analysis and Nutrition , Institute of Chemical Technology , Prague , Czech Republic.
authors.forename: Jana
authors.initials: J
authors.lastname: Kováčová
authors.affiliation: b Department of Food Analysis and Nutrition , Institute of Chemical Technology , Prague , Czech Republic.
authors.forename: Jana
authors.initials: J
authors.lastname: Kohoutková
authors.affiliation: b Department of Food Analysis and Nutrition , Institute of Chemical Technology , Prague , Czech Republic.
authors.forename: Marie
authors.initials: M
authors.lastname: Suchanová
authors.affiliation: b Department of Food Analysis and Nutrition , Institute of Chemical Technology , Prague , Czech Republic.
authors.forename: Jana
authors.initials: J
authors.lastname: Hajšlová
mesh_terms: D001937:Brassica / Q000737:chemistry*; D002681:China; D002851:Chromatography, High Pressure Liquid; D005506:Food Contamination / Q000032:analysis*; D005659:Fungicides, Industrial / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis*; D053719:Tandem Mass Spectrometry
chemical_list: D005659:Fungicides, Industrial; D010573:Pesticide Residues
keywords: Brassica vegetable; baby food production; half-lives; low-residue production; pesticides; pre-harvest interval; residues