COLORIMETRIC DETERMINATION OF IRON IN BEER BY FLOW-INJECTION ANALYSIS USING THE MERGING ZONES TECHNIQUE

• Tipo: Artigo em Revista Científica Internacional
• Data: 1995

Autores

FERNANDES, SMV (Autor) Outra; RANGEL, AOSS (Autor) Outra; Lima, JLFC (Autor) FFUP

Revista

Título: Journal of the Institute of Brewing

Vol. 101

Páginas: 281-284

ISSN: 0046-9750

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 10 Citações

Outras Informações

ID Authenticus: P-001-GPZ

Abstract (EN): 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 4