Organochlorine pesticide residues in European sardine, horse mackerel and Atlantic mackerel from Portugal.
ABSTRACT This paper reports the results for the surveillance of nine organochlorine pesticides (HCH isomers (alpha, beta, e, gamma), p,p'-DDD, p,p'-DDT, p,p'-DDE, p,p'-DDD, HCB and aldrin) in muscle of three fish species, European pilchard (Sardina pilchardus), Atlantic horse mackerel (Trachurus trachurus) and Atlantic mackerel (Scomber scombrus). Analytical methodology included n-hexane extraction, clean-up with 2% deactivated Florisil, and quantification with gas chromatography-electron capture detection (GC-ECD). The highest mean concentrations were found for p,p'-DDT in sardine and mackerel at levels of 30.1 and 109.9 microg kg(-1), respectively, and for p,p'-DDD in horse mackerel at 51.9 microg kg(-1). Three species had higher levels for S-DDT than S-HCH. The estimated daily intake of organochlorine pesticides in the three species showed that in sardine, the highest EDIs were found for aldrin, at 1.8 ng kg(-1) bw day(-1), which represents 1.8% of the acceptable daily intake (ADI), and for ss-HCH, at 4.0 ng kg(-1) bw day(-1), representing 0.4% of ADI. Lowest values were found for Atlantic mackerel. Statistical analysis to determine the differences in mean concentrations of pesticides between species, and any correlation between groups of residues related with each one of the species, was undertaken.
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ABSTRACT: The human health risks due to the dietary exposure to organochlorine compounds (OC) were assessed in the Catalan stretch of the Ebro River (Spain). The concentrations of various persistent organic pollutants (POPs): polychlorinated biphenyls (PCBs), hexachlorobenzene (HCB), pentachlorobenzene (PeCB), various hexachlorocyclohexanes (HCHs), as well as dichloro-diphenyl-trichloroethane (DDT) and derivatives, were determined in samples of fish and seafood, vegetables, fruits, and rice, acquired in localities of the zone under evaluation. In general terms, pollutant concentrations were similar to recent levels reported in the literature. With the exception of the consumption of fish and seafood by children, and due to the presence of PCBs (Aroclor 1254), food intake from local sources does not pose non-carcinogenic risks for all population groups examined. The presence of OC in foods of local origin in the Catalan basin of the Ebro River would not increase the health risks for the area's consumers.Human and Ecological Risk Assessment 05/2010; 16(3):588-602. · 1.08 Impact Factor
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ABSTRACT: A method for the multiresidue analysis of 16 organochlorine insecticides in mussel tissue was developed. The method was based on the microwave-assisted extraction of the mussel tissue by the use of acetonitrile followed by the solid phase extraction (SPE) cleanup of the extracts and subsequent analysis by GC/MS in the selected ion monitoring (SIM) mode. Microwave-assisted extraction (MAE) operational parameters (extraction temperature and time, extractant volume) were optimized with respect to extraction efficiency of the target compounds. Recoveries >70 % with percent relative standard deviation (RSD%) <20 % were obtained for all compounds under the selected parameters. The Florisil cleanup step was efficient enough in the removal of co-extracted substances so that no adverse effect on the chromatographic system was observed. The proposed method was used for the analysis of mussel samples from aquacultures in Greece. Overall the proposed method was efficient, fast, and had low solvent consumption.Food Analytical Methods 07/2013; · 1.80 Impact Factor