Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/7459
Título: Development of a flow method for the determination of phosphate in estuarine and freshwaters - Comparison of flow cells in spectrophotometric sequential injection analysis
Autor: Mesquita, Raquel B.R.
Ferreira, M. Teresa S.O.B.
Tóth, Ildikó V.
Bordalo, Adriano A.
McKelvied, Ian D.
Rangel, António O.S.S.
Palavras-chave: Sequential injection
Phosphate determination
Estuarine and river water
Spectrophotometry
Multireflective
Data: 2011
Editora: Elsevier
Citação: MESQUITA, Raquel B. R....[et al] - Development of a flow method for the determination of phosphate in estuarine and freshwaters - Comparison of flow cells in spectrophotometric sequential injection analysis. Analytica Chimica Acta. ISSN 00032670. Vol. 701 (2011), p. 15– 22
Resumo: A sequential injection system with dual analytical line was developed and applied in the comparison of two different detection systems viz; a conventional spectrophotometer with a commercial flow cell, and a multireflective flow cell coupled with a photometric detector under the same experimental conditions. The study was based on the spectrophotometric determination of phosphate using the molybdenumblue chemistry. The two alternative flow cells were compared in terms of their response to variation of sample salinity, susceptibility to interferences and to refractive index changes. The developed method was applied to the determination of phosphate in natural waters (estuarine, river, well and ground waters). The achieved detection limit (0.007 mM PO4 3−) is consistent with the requirement of the target water samples, and a wide quantification range (0.024–9.5 mM) was achieved using both detection systems.
Peer review: yes
URI: http://hdl.handle.net/10400.14/7459
Versão do Editor: http://www.sciencedirect.com/science/article/pii/S0003267011007707
Aparece nas colecções:CBQF - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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RBR Mesquita, Analytica Chimica Acta 701 (2011) 15– 22.pdf346,9 kBAdobe PDFVer/Abrir


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