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

• Tipo: Artigo em Revista Científica Internacional
• Data: 2007

Autores

Cunha, SC (Autor) Outra; Fernandes, JO (Autor) FFUP; Beatriz, M (Autor) FFUP; Oliveira, PP (Autor) FEUP

Revista

Título: Food Additives and Contaminants

Vol. 24 Nº 2

Páginas: 156-164

ISSN: 0265-203X

Editora: Taylor & Francis

Indexação

ISI Web of Knowledge - 15 Citações

ISI Web of Science

Scopus - 23 Citações

Classificação Científica

CORDIS: Ciências da Saúde

FOS: Ciências agrárias > Outras ciências agrárias

Outras Informações

ID Authenticus: P-004-BZQ

DOI: 10.1080/02652030600970374

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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9