Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/2981
Título: Voltammetric determination of dialifos in soils with a mercury film ultramicroelectrode
Autor: Morais, Simone
Tavares, Oriza
Delerue-Matos, Cristina
Palavras-chave: Dialifos
Mercury film ultramicroelectrode
Microwave-assisted solvent extraction
Data: 2005
Editora: Taylor & Francis
Relatório da Série N.º: Analytical Letters; Vol.38, Issue 8
Resumo: An extraction-adsorptive stripping voltammetric procedure for the determination of the pesticide dialifos in soil samples using microwave-assisted solvent extraction and a mercury film ultramicroelectrode was developed. The method is based on the use of hexane-acetone solvent (1:1, v/v) and on controlled adsorptive accumulation of the insecticide at the potential of -0.10V (versus Ag/AgCl) in the presence of Britton-Robinson buffer (pH 2.0). Soil sample extracts were analyzed directly after drying and redissolution with the supporting electrolyte, but without other pretreatment. The limit of detection obtained for a 10sec collection time was 2.0x10-8 mol L-1. Recovery experiments for the global procedure, at the 0.100µgg-1 level, gave satisfactory average and standard deviation results for the two different soils tested.
Peer review: yes
URI: http://hdl.handle.net/10400.22/2981
ISSN: 0003-2719
Versão do Editor: http://www.tandfonline.com/doi/abs/10.1081/AL-200060942#.UpXW8Ur6Q25
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