Multiresidue pesticides analysis in soils using modified QuEChERS with disposable pipette extraction and dispersive solid-phase extraction

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

Virginia C Fernandes (Autor) Outra; Valentina F Domingues (Autor) Outra; Nuno Mateus (Autor) FCUP; Cristina Delerue Matos (Autor) Outra

Revista

Título: Journal of Separation Science

Vol. 36

Páginas: 376-382

ISSN: 1615-9306

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 77 Citações

Scopus - 78 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-005-3AR

DOI: 10.1002/jssc.201200673

Abstract (EN): QuEChERS original method was modified into a new version for pesticides determination in soils. The QuEChERS method is based on liquid-liquid portioning with ACN and was followed by cleanup step using dispersive SPE and disposable pipette tips. Gas chromatographic separation with MS detection was carried out for pesticides quantification. The method was validated using recovery experiments for 36 multiclass pesticides. Mean recoveries of pesticides at each of the four spiking levels between 10-300 mu g/kg of soil ranged from 70-120% for 26 pesticides with RSD values less than 15%. The method achieved low limit of detection less than 7.6 mu g/kg. Matrix effects were observed for 13 pesticides. Matrix effects were compensated by using matrix-matched calibration. The method was applied successfully using d-SPE or DPX in the analysis of the pesticides in soils from organic farming and integrated pest management.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7