Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/6584
Título: Flow injection determination of sodium, potassium, calcium, and magnesium in beer by flame emission and atomic absorption spectrometry
Autor: Fernandes, Sílvia M. V.
Rangel, António O. S. S.
Palavras-chave: Flow injection
Beer
Na
K
Ca
Mg
Flame emission
Atomic absorption spectrometry
Data: 1997
Editora: American Chemical Society
Citação: FERNANDES, Sílvia M. V. ; RANGEL, António O. S. S. - Flow Injection Determination of Sodium, Potassium, Calcium, and Magnesium in Beer by Flame Emission and Atomic Absorption Spectrometry. Journal of Agricultural and Food Chemistry. ISSN 1520-5118. 45:4 (1997) 1269-1272
Resumo: Flow injection systems for the determination of sodium and potassium, by flame emission photometry, and calcium and magnesium, by atomic absorption spectrometry, in beer are described. The samples were directly injected in the flow system where automatic dilution occurred, and reagent addition using the merging zones technique was performed. Lanthanum(III) consumption was reduced in about 20-80-fold compared to conventional manual atomic absorption determinations. Sampling rates of 120-200 determinations/h were achieved. The results were in agreement with the reference procedures (relative deviations below 3.8%) and present good reproducibility (relative standard deviations lower than 1.6% for 10 consecutive measurements).
Peer review: yes
URI: http://hdl.handle.net/10400.14/6584
Aparece nas colecções:ESB - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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