Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/5874
Título: Colorimetric determination of iron in beer by flow injection analysis using
Autor: Fernandes, Sílvia M. V.
Rangel, António O.S.S.
Lima, Jose L. F. C.
Palavras-chave: Flow injection analysis
Colorimetric iron determination
Beer
Merging zones
Data: 1995
Editora: Institute of Brewing
Citação: FERNADES, Sílvia M. V.; RANGEL, António O.S.S.; LIMA, José L. F. C. - Colorimetric determination of iron in beer by flow injection analysis using. Journal Institute of Brewing. ISSN 0046-9750. Vol. I01 (1995), pp. 281-284
Resumo: A flow injection analysis system with colorimetric detection for the iron determination in beer is described. The methodology is based on the formation of a complex produced by the reaction of iron (II) with 1,10-phenanthroline, after reduction of iron (III) to iron (II) by ascorbic acid. The asymmetric merging zones technique was used to allow the sequential blank and sample absorbance readings. The results obtained with the developed system were in good agreement with those provided by the reference method (relative deviations lower than 4%) and exhibited a precision (relative standard deviation) better than 7%. A sampling-rate of 60 determinations per hour can be achieved.
Peer review: yes
URI: http://hdl.handle.net/10400.14/5874
Aparece nas colecções:ESB - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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