Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/2645
Título: Sequential injection trace determination of iron in natural waters using a long-pathlength liquid core waveguide and different spectrophotometric chemistries
Autor: Páscoa, Ricardo N.M.J.
Tóth, Ildikó V.
Rangel, António O.S.S.
Data: 2009
Editora: American Society of Limnology and Oceanography
Citação: "Limnololy Oceanography: Methods". ISSN 1541-5856. 7 (2009) 795-802
Resumo: We developed a sequential injection analysis (SIA) method for the determination of iron in coastal, ground, and surface fresh waters using two different reagents (ferrozine and 1,10-phenathroline). The methodology uses a double-line SIA system to improve mixing conditions between sample and reagent solutions. A liquid waveguide capillary cell (LWCC) with 1.0 m pathlength, 550 μm i.d., and 250 μL internal volume was used to enhance the sensitivity of the determination. The detection limits for the ferrozine and 1,10-phenanthroline reagent were 0.15 and 0.35 μg L–1, respectively. The system provides a linear response up to 20 μg L–1 and has a high throughput rate (41 h–1), low reagent consumption, and also low effluent production for both reagents. The developed method was applied to natural waters (river, well, ground, potable, and sea waters) and one reference water sample.
URI: http://hdl.handle.net/10400.14/2645
Versão do Editor: http://www.aslo.org/lomethods/free/2009/index.html
Aparece nas colecções:ESB - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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