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Comparison of matrix solid-phase dispersion and liquid-liquid extraction for the chromatographic determination of fenthion and its metabolites in olives and olive oils

Title
Comparison of matrix solid-phase dispersion and liquid-liquid extraction for the chromatographic determination of fenthion and its metabolites in olives and olive oils
Type
Article in International Scientific Journal
Year
2007
Authors
Cunha, SC
(Author)
Other
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Beatriz, M
(Author)
FFUP
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Oliveira, PP
(Author)
FEUP
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Journal
Vol. 24 No. 2
Pages: 156-164
ISSN: 0265-203X
Publisher: Taylor & Francis
Indexing
Scientific classification
CORDIS: Health sciences
FOS: Agrarian Sciences > Other Agrarian Sciences
Other information
Authenticus ID: P-004-BZQ
Resumo (PT): Matrix solid-phase dispersion (MSPD) methodology has been developed to extract fenthion and its metabolites from olives and olive oils, and the technique compared with conventional liquid-liquid extraction (LLE). The method was applied to olives and olive oil samples obtained from olive groves treated with fenthion. Pesticide residues were analysed by gas chromatography (GC) using a nitrogen-phosphorus detector. Both extraction methods gave a linear response over the concentration range assayed (0.03-1 mg kg-1 for MSPD and 0.1-1 mg kg-1 for LLE). Recoveries and RSD (n = 6) values in olives were 85-112% and 2-6% for MSPD, and 68-108% and 4-16% for LLE, respectively. In the case of olive oil, recoveries and RSD (n = 6) values were 67-98% and 5-11% for MSPD, and 63-115% and 6-14% for LLE, respectively. When compared to LLE, the newly developed MSPD method was twice as sensitive and required 10 times less sample weight. <br> <br> Keywords: Fenthion; metabolites; matrix solid-phase dispersion; olive oil; GC/NPD <br> <a target="_blank" href="http://www.informaworld.com/smpp/content~db=all~content=a769982498"> Texto integral</a> <br> <br>
Abstract (EN): Matrix solid-phase dispersion (MSPD) methodology has been developed to extract fenthion and its metabolites from olives and olive oils, and the technique compared with conventional liquid-liquid extraction (LLE). The method was applied to olives and olive oil samples obtained from olive groves treated with fenthion. Pesticide residues were analysed by gas chromatography (GC) using a nitrogen-phosphorus detector. Both extraction methods gave a linear response over the concentration range assayed (0.03-1 mg kg(-1) for MSPD and 0.1-1 mg kg(-1) for LLE). Recoveries and RSD (n = 6) values in olives were 85-112% and 2-6% for MSPD, and 68-108% and 4-16% for LLE, respectively. In the case of olive oil, recoveries and RSD (n = 6) values were 67-98% and 5-11% for MSPD, and 63-115% and 6-14% for LLE, respectively. When compared to LLE, the newly developed MSPD method was twice as sensitive and required 10 times less sample weight.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 9
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