Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/6091
Título: Flow injection sequential speciation of free and total potassium in fortified wines
Autor: Rangel, António O. S. S.
Tóth, Ildikó V.
Palavras-chave: Flow injection
Potassium speciation
Wine
Potentiometry
Flame emission spectrometry
Data: 1996
Editora: The Japan Society of Analytical Chemistry / The Japan Society for Analytical Chemistry
Citação: RANGEL, António O. S. S. ; TÓTH, Ildikó V. - Flow injection sequential speciation of free and total potassium in fortified wines. Analytical Sciences. ISSN 0910-6340. 12 (1996) 887-891
Resumo: A flow injection system for the potassium speciation in fortified wines, using two detectors placed in series, is described. The free, or ionized form, is monitored in a tubular-shaped potassium ion-selective electrode, and the total potassium content in a flame emission spectrometer used as end-of-line detector. Potassium determinations can be carried out in a linear range from 300 to 2000 mg 1-1, with a sampling-rate of 60 samples per hour. The results obtained were comparable to the conventional procedures using the same detection systems, and the precision was good (relative standard deviations below 3.1%o for free potassium and 3.8% for total potassium).
Peer review: yes
URI: http://hdl.handle.net/10400.14/6091
Versão do Editor: http://www.journalarchive.jst.go.jp/english/jnltoc_en.php?cdjournal=analsci1985&cdvol=12&noissue=6
Aparece nas colecções:ESB - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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