Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/2999
Título: Electroanalytical study of the pesticide asulam
Autor: Nouws, Henri P. A.
Delerue-Matos, Cristina
Lima, J. L. F. C.
Garrido, E. Manuela
Vincke, Pieter
Maes, Noel A.
Palavras-chave: Asulam
Herbicides
Oxidation
Square wave voltammetry
Flow injection analysis
Amperometric detection
Data: 2002
Editora: Taylor & Francis
Relatório da Série N.º: International Journal of Environmental Analytical Chemistry; Vol. 82, Issue 2
Resumo: The electrochemical behaviour of the herbicide Asulam was studied by cyclic and square wave voltammetry. Asulam may be irreversibly oxidised at a glassy carbon electrode. Maximum currents were obtained at pH=1.9 in aqueous electrolyte solution. Based on the electrochemical behaviour of Asulam, two analytical methodologies were developed for its determination in water samples, using square wave voltammetry (SWV) and flow injection analysis (FIA) coupled with an amperometric detector. Limits of detection of 7.1x10-6 mol L-1 and 1.2x10-8 mol L-1 for SWV and FIA respectively, were achieved. Repeatability was calculated by assessing the relative standard deviation (%) for 10 consecutive determinations of one sample. The found values were 2.1% for SWV and 5.0% for FIA. Validation of the results provided by SWV and FIA methodologies was performed by comparison with results from an HPLC-DAD technique. Good relative deviations were found (<5%). Recovery trials were performed to assess the accuracy of the results and the obtained values were between 84% and 107% for both methods.
Peer review: yes
URI: http://hdl.handle.net/10400.22/2999
Versão do Editor: http://www.tandfonline.com/doi/abs/10.1080/03067310290024111#.UpYE7Ur6Q25
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