title: Application of the QuEChERS method for the determination of organochlorine pesticide residues in Brazilian fruit pulps by GC-ECD.
abstract: The Quick, Easy, Cheap, Effective, Rugged, and Safe (QuEChERS) method was applied to the extraction of 14 organochlorine pesticides (OCPs) residues from commercial fruit pulps available in supermarkets in Fortaleza, Northeastern Brazil. The analyses were carried out by gas chromatography (GC), coupled to an electron-capture detector (ECD), and were confirmed by GC-tandem mass spectrometry (MS). The parameters of the analytical method, such as accuracy, precision, linear range, limits of detection and quantification, were determined for each pesticide. The results showed good linearity (R2≥ 0.9916) and the overall average recoveries were considered satisfactory obtaining values between 69 and 110%, RSD of 2-15 %, except for hexachlorobenzene (HCB) in açai, acerola and guava pulp samples. The OCPs were detected in guava (α-HCH; lindane) and soursop (α, β-HCH isomers) samples. The QuEChERS method and GC-ECD were successfully used to analyze OCPs in commercially available Brazilian fruit pulps and can be applied in routine analytical laboratories.
authors.affiliation: a Departamento de Química Analítica e Físico-Química , Universidade Federal do Ceará (UFC) , Fortaleza , CE , Brazil.
authors.forename: Mário
authors.initials: M
authors.lastname: Paz
authors.affiliation: b REQUIMTE/LAQV , Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto , Porto , Portugal.
authors.forename: Luísa
authors.initials: L
authors.lastname: Correia-Sá
authors.affiliation: a Departamento de Química Analítica e Físico-Química , Universidade Federal do Ceará (UFC) , Fortaleza , CE , Brazil.
authors.forename: Carla B
authors.initials: CB
authors.lastname: Vidal
authors.affiliation: a Departamento de Química Analítica e Físico-Química , Universidade Federal do Ceará (UFC) , Fortaleza , CE , Brazil.
authors.forename: Helena
authors.initials: H
authors.lastname: Becker
authors.affiliation: a Departamento de Química Analítica e Físico-Química , Universidade Federal do Ceará (UFC) , Fortaleza , CE , Brazil.
authors.forename: Elisane
authors.initials: E
authors.lastname: Longhinotti
authors.affiliation: b REQUIMTE/LAQV , Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto , Porto , Portugal.
authors.forename: Valentina F
authors.initials: VF
authors.lastname: Domingues
authors.affiliation: b REQUIMTE/LAQV , Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto , Porto , Portugal.
authors.forename: Cristina
authors.initials: C
authors.lastname: Delerue-Matos
mesh_terms: D001938:Brazil; D065748:Euterpe / Q000737:chemistry; D005504:Food Analysis / Q000379:methods; D005506:Food Contamination / Q000032:analysis*; D005638:Fruit / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D001556:Hexachlorocyclohexane / Q000032:analysis; D006843:Hydrocarbons, Chlorinated / Q000032:analysis; D010573:Pesticide Residues / Q000032:analysis; D010575:Pesticides / Q000032:analysis*; D031647:Psidium / Q000737:chemistry; D053719:Tandem Mass Spectrometry / Q000379:methods*
chemical_list: D006843:Hydrocarbons, Chlorinated; D010573:Pesticide Residues; D010575:Pesticides; C040534:alpha-hexachlorocyclohexane; D001556:Hexachlorocyclohexane; C023888:beta-hexachlorocyclohexane
keywords: Fruit pulps; QuEChERS; gas chromatography; organochlorine pesticides