Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/2772
Título: Development of sequential injection methodologies for the spectrophotometric direct and kinetic determination of aluminium in natural and waste waters
Autor: Mesquita, Raquel B. R.
Rangel, António O. S. S.
Palavras-chave: Sequential injection
Spectrophotometry
Aluminium
Waters
kinetic determination
Data: 2008
Editora: Sociedade Brasileira de Química
Citação: "Journal of the Brazilian chemical society". ISSN 0103 - 5053. 19: 6 (2008) 1171-1179
Resumo: Two sequential injection methodologies for the spectrophotometric determination of reactive aluminium in water samples are proposed, based on the reaction between chrome azurol S (CAS) and aluminium. The two methods involve a direct and a kinetic methodology (for its application to coloured waste waters), both accommodated within the same manifold. The working ranges obtained were: 0.040-0.500 mg Al Lˉ¹ for direct method and 0.050-0.300 mg Al Lˉ¹ for the kinetic method. The described system has high degree of automation, enabling sampling throughputs of 31 and 57 hˉ¹ for the kinetic method and direct methods, respectively. The reagents consumption per determination is low: 46 μg of CAS, 3.75 mg of sodium acetate and 25 μg of ascorbic acid. The volume of effluent produced per determination is only around 2.8 mL in the direct method and 3.4 mL in the kinetic method.
URI: http://hdl.handle.net/10400.14/2772
Versão do Editor: http://jbcs.sbq.org.br/jbcs/2008/vol19_n6/index.htm
Aparece nas colecções:ESB - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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