Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/2989
Título: Development of an FIA system with amperometric detection for determination of bentazone in estuarine waters
Autor: Cerejeira, Rodrigo P. A. G.
Delerue-Matos, Cristina
Vaz, M. Carmo V. F.
Palavras-chave: Amperometry
Bentazone
FIA system
Herbicides
Estuarine waters
Data: 2002
Editora: Springer-Verlag
Relatório da Série N.º: Analytical and Bioanalytical Chemistry; Vol. 373, Issue 4-5
Resumo: On the basis of its electrochemical behaviour a new flow-injection analysis (FIA) method with amperometric detection has been developed for quantification of the herbicide bentazone (BTZ) in estuarine waters. Standard solutions and samples (200 µL) were injected into a water carrier stream and both pH and ionic strength were automatically adjusted inside the manifold. Optimization of critical FIA conditions indicated that the best analytical results were obtained at an oxidation potential of 1.10 V, pH 4.5, and an overall flow-rate of 2.4 mL min–1. Analysis of real samples was performed by means of calibration curves over the concentration range 2.5x10–6 to 5.0x10–5 mol L–1, and results were compared with those obtained by use of an independent method (HPLC). The accuracy of the amperometric determinations was ascertained; errors relative to the comparison method were below 4% and sampling rates were approximately 100 samples h–1. The repeatability of the proposed method was calculated by assessing the relative standard deviation (%) of ten consecutive determinations of one sample; the value obtained was 2.1%.
Peer review: yes
URI: http://hdl.handle.net/10400.22/2989
ISSN: 1618-2642
1618-2650
Versão do Editor: http://link.springer.com/article/10.1007%2Fs00216-002-1344-5
Aparece nas colecções:ISEP – GRAQ – Artigos

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
ART_RodrigoCerejeira_2002_GRAQ.pdf274,18 kBAdobe PDFVer/Abrir


FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Degois 

Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.