title: Use of green coating (cork) in solid-phase microextraction for the determination of organochlorine pesticides in water by gas chromatography-electron capture detection.
abstract: A novel method for the determination of organochlorine pesticides in water samples with extraction using cork fiber and analysis by gas chromatography with electron capture detector was developed. Also, the procedure to extract these pesticides with DVB/Car/PDMS fiber was optimized. The optimization of the variables involved in the extraction of organochlorine pesticides using the aforementioned fibers was carried out by multivariate design. The optimum extraction conditions were sample temperature 75 °C, extraction time 60 min and sodium chloride concentration 10% for the cork fiber and sample temperature 50 °C and extraction time 60 min (without salt) for the DVB/Car/PDMS fiber. The quantification limits for the two fibers varied between 1.0 and 10.0 ng L(-1). The linear correlation coefficients were >0.98 for both fibers. The method applied with the use of the cork fiber provided recovery values between 60.3 and 112.7 and RSD≤25.5 (n=3). The extraction efficiency values for the cork and DVB/Car/PDMS fibers were similar. The results show that cork is a promising alternative as a coating for SPME.
authors.affiliation: Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis 88040900, SC, Brazil.
authors.forename: Adriana
authors.initials: A
authors.lastname: Neves Dias
authors.affiliation: Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis 88040900, SC, Brazil.
authors.forename: Vanessa
authors.initials: V
authors.lastname: Simão
authors.affiliation: Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis 88040900, SC, Brazil.
authors.forename: Josias
authors.initials: J
authors.lastname: Merib
authors.affiliation: Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis 88040900, SC, Brazil. Electronic address: eduardo.carasek@ufsc.br.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Carasek
mesh_terms: D002849:Chromatography, Gas; D004583:Electrons; D006843:Hydrocarbons, Chlorinated / Q000032:analysis* / Q000737:chemistry; D010575:Pesticides / Q000032:analysis* / Q000737:chemistry; D024301:Plant Bark; D029963:Quercus; D052617:Solid Phase Microextraction; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry
chemical_list: D006843:Hydrocarbons, Chlorinated; D010575:Pesticides; D014874:Water Pollutants, Chemical
keywords: Cork fiber; Gas chromatography; Organochlorine pesticides; SPME; Water samples