Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/6870
Título: Use of a Mixing Chamber for Sample Preparation and Multiple Collection in Sequential Injection Analysis: Determination of Sulfate in Wines
Autor: Silva, Helena R.
Segundo, Marcela A.
Rangel, António O. S. S.
Palavras-chave: Sequential injection
Mixing chamber
Turbidimetry
sulfate
Wine
Data: 2003
Editora: Sociedade Brasileira de Química
Citação: SILVA, Helena R. ; SEGUNDO, Marcela A. ; RANGEL, António O. S. S. - Use of a Mixing Chamber for Sample Preparation and Multiple Collection in Sequential Injection Analysis: Determination of Sulfate in Wines. Journal of the Brazilian Chemical Society. ISSN 0103-5053. Vol. 14, n.º1 (2003), p. 59-64
Resumo: A sequential injection system for determination of sulfate in wines was developed. It was based on the formation of BaSO4, measured turbidimetrically at 420 nm. As sample dilution and acidification were required, both sample and acid were sent to a mixing chamber placed in a lateral port of the selection valve; after thorough mixing, up to six aliquots could be drawn and analyzed. A linear calibration curve was established using 10% v/v ethanol standards with concentrations between 300 and 1500 mg L-1 of K2SO4. The results obtained by the present methodology were statistically comparable with those furnished by the reference procedure, with relative deviations < 3.5%. The sample frequency was about 5 samples per h with relative standard deviations (RSD) < 10%.
Peer review: yes
URI: http://hdl.handle.net/10400.14/6870
Versão do Editor: http://jbcs.sbq.org.br/jbcs/2003/v14_n1/index.htm
Aparece nas colecções:ESB - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review



FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Degois 

Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.