Desarrollo de un método multiresiduo mediante SPE-GC-MS para la determinación de pesticidas y algunos de sus productos de degradación en aguas superficiales y subterráneas

  1. María José Climent Morales 1
  2. Eliseo Herrero Hernández 2
  3. María Jesús Sánchez Martín 2
  4. María Sonia Rodríguez Cruz 2
  5. Roberto Enrique Urrutia Perez 1
  1. 1 Universidad de Concepción
    info

    Universidad de Concepción

    Concepción, Chile

    ROR https://ror.org/0460jpj73

  2. 2 Instituto de Recursos Naturales y Agrobiología de Salamanca IRNASA-CSIC
Llibre:
IX Congresso Ibérico de Agroengenharia: Livro de Atas
  1. José Carlos Barbosa (coord.)
  2. António Castro Ribeiro (coord.)

Editorial: Instituto Politécnico de Bragança

ISBN: 978-972-745-247-7

Any de publicació: 2018

Pàgines: 1052-1060

Congrés: Congreso Ibérico de Agroingeniería y Ciencias Hortícolas (9. 2017. Braganza)

Tipus: Aportació congrés

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Resum

A multiresidue analysis method using solid phase extraction (SPE) and gas chromatography coupled to mass spectrometry (GC-MS) was developed to determine 11 pesticides and 5 of their main degradation products in natural waters. Different parameters affecting the efficiency of the SPE process, such as sorbent type, elution solvent and sample volume were optimized. The best results were obtained by preconcentrating 500 mL of water through Oasis HLB polymeric cartridges and eluting them with acetone and acetonitrile. In order to ensure a good quantification, matrix-matched standards were used, obtaining a good linearity in the range of concentrations studied (0.10-1.5 μg L-1), with recovery values> 60%, precisions <19% and detection limits <0,1μg L-1. The proposed methodology was used to evaluate the presence of pesticides and their degradation products in samples of surface and groundwater of the Cachapoal river basin, Central Chile, region affected by an intense agricultural activity.

Fuente de los datos: Dialnet