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

• Type: Article in International Scientific Journal
• Date: 2013

Authors

Virginia C Fernandes (Author) Other; Valentina F Domingues (Author) Other; Nuno Mateus (Author) FCUP; Cristina Delerue Matos (Author) Other

Journal

Title: Journal of Separation Science

Vol. 36

Pages: 376-382

ISSN: 1615-9306

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 77 Citations

Scopus - 78 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7