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Author(s): Virginia C Fernandes
Diogo Pestana
Rosario Monteiro
Gil Faria
Manuela Meireles
Luisa Correia Sa
Diana Teixeira
Ana Faria
Conceicao Calhau
Valentina F Domingues
Cristina Delerue Matos
Title: Optimization and validation of organochlorine compounds in adipose tissue by SPE-gas chromatography
Issue Date: 2012
Abstract: Scientific evidence has shown an association between organochlorine compounds (OCC) exposure and human health hazards. Concerning this, OCC detection in human adipose samples has to be considered a public health priority. This study evaluated the efficacy of various solid-phase extraction (SPE) and cleanup methods for OCC determination in human adipose tissue. Octadecylsilyl endcapped (C18-E), benzenesulfonic acid modified silica cation exchanger (SA), poly(styrene-divinylbenzene (EN) and EN/RP18 SPE sorbents were evaluated. The relative sample cleanup provided by these SPE columns was evaluated using gas chromatography with electron capture detection (GCECD). The C18-E columns with strong homogenization were found to provide the most effective cleanup, removing the greatest amount of interfering substance, and simultaneously ensuring good analyte recoveries higher than 70%. Recoveries?>?70% with standard deviations (SD)?<?15% were obtained for all compounds under the selected conditions. Method detection limits were in the 0.0030.009?mg/kg range. The positive samples were confirmed by gas chromatography coupled with tandem mass spectrometry (GC-MS/MS). The highest percentage found of the OCC in real samples corresponded to HCB, o,p'-DDT and methoxychlor, which were detected in 80 and 95% of samples analyzed respectively. Copyright (c) 2012 John Wiley & Sons, Ltd.
Subject: Análise instrumental, Química
Instrumental analysis, Chemical sciences
Scientific areas: Ciências exactas e naturais::Química
Natural sciences::Chemical sciences
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FCUP - Artigo em Revista Científica Internacional
FMUP - Artigo em Revista Científica Internacional

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