Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/6444
Título: Sequential determination of titratable acidity and tartaric acid in wines by flow injection spectrophotometry
Autor: Rangel, António, O.S.S.
Tóth, Ildikó V.
Palavras-chave: Flow injection
Total acidity
Tartaric acid
Wine
Data: 1998
Editora: Royal Society of Chemistry
Citação: RANGEL, António O.S.S.; TÓTH, Ildikó V. - Sequential determination of titratable acidity and tartaric acid in wines by flow injection spectrophotometry. Analyst. ISSN 0003-2654. Vol. 123 (1998), p. 661–664
Resumo: A flow injection manifold is proposed for the sequential determination of titratable (total) acidity based on a pseudotitration and of tartaric acid based on the formation of a coloured vanadate complex. The method involves in-line dialysis prior to injection to avoid interference from the sample background absorption in the spectrophotometric detection. The changes in the colour of both reactions were monitored using two flow cells aligned in the optical path of a single spectrophotometer. Wine samples were analysed without any sample pre-treatment; table wines in the range 1–10 g l21 (total acidity) and 0.5–4 g l21 (tartaric acid) and port wines in the range 1–8 g l21 (total acidity) and 0.5–5 g l21 (tartaric acid). Sixteen samples can be measured per hour, and the results were comparable to those obtained by reference procedures for both determinations. RSDs (n = 10) generally lower than 3% were obtained
Peer review: yes
URI: http://hdl.handle.net/10400.14/6444
Versão do Editor: http://pubs.rsc.org/en/Content/ArticleLanding/1998/AN/a707477h
Aparece nas colecções:ESB - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review



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