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Determination of ametryn in soils via microwave-assisted solvent extraction coupled to anodic stripping voltammetry with a gold ultramicroelectrode

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Abstract

An extraction-anodic adsorptive stripping voltammetric procedure using microwave-assisted solvent extraction and a gold ultramicroelectrode was developed for determining the pesticide ametryn in soil samples. The method is based on the use of acetonitrile as extraction solvent and on controlled adsorptive accumulation of the herbicide at the potential of 0.50 V (vs. Ag/AgCl) in the presence of Britton-Robinson buffer (pH 3.3). Soil sample extracts were analysed directly after drying and redissolution with the supporting electrolyte but without other pre-treatment. The limit of detection obtained for a 10 s collection time was 0.021 μg g−1. Recovery experiments for the global procedure, at the 0.500 μg g−1 level, gave satisfactory mean and standard deviation results which were comparable to those obtained by HPLC with UV detection.

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Acknowledgements

The authors thank the Fundação para a Ciência e a Tecnologia for financial support through the project POCTI/AGR/44491/2002 (co-financed by FEDER). Oriza Tavares is grateful to POCTI for her fellowship.

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Authors and Affiliations

  1. Departamento de Engenharia Química, Requimte/Instituto Superior de Engenharia do Instituto Politécnico do Porto, Rua S. Tomé, 4200, Porto, Portugal

    Oriza Tavares, Simone Morais, Paula Paíga & Cristina Delerue-Matos

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  1. Oriza Tavares
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  2. Simone Morais
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  3. Paula Paíga
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  4. Cristina Delerue-Matos
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Correspondence to Simone Morais.

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Tavares, O., Morais, S., Paíga, P. et al. Determination of ametryn in soils via microwave-assisted solvent extraction coupled to anodic stripping voltammetry with a gold ultramicroelectrode. Anal Bioanal Chem 382, 477–484 (2005). https://doi.org/10.1007/s00216-004-3045-8

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  • DOI: https://doi.org/10.1007/s00216-004-3045-8

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