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A flow-injection system coupled to a micro-guard cartridge for monitoring a vinification process
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Orientador(es)
Resumo(s)
The present paper describes a flow-injection system coupled to a Micro-Guard cartridge and a miniaturized optical CCD detection system used to monitor the sugars (glucose/fructose) and ethanol content during alcoholic fermentation. The carrier stream (mobile phase) is composed of an aqueous sulfuric acid solution. The flow parameters were studied in order to obtain a good resolution and a wide dynamic concentration range, with a good repeatability. The relative standard deviation (RSD) obtained was inferior to 4%, for n = 3. It was possible to achieve a linear range of up to 12 g L(-1) of sugars and up to 2% (v/v) of ethanol with a detection limit of 2.3 g L(-1) and 0.4% (v/v), for sugars and ethanol concentrations, respectively. The proposed system was successfully applied to monitor a vinification process by the quantification of sugars and ethanol, and also in some finished port wines.
Descrição
Palavras-chave
Ethanol Sugars Port wine Synthetic grape juice Automation
Contexto Educativo
Citação
VIDIGAL, Susana ; RANGEL, António O. S. S. - A flow injection system coupled to a micro-guard cartridge for monitoring a vinification process. Analytical Sciences. ISSN 0910-6340. Vol. 30, Nº11 (2014), p. 1057-1062
Editora
Japan Society for Analytical Chemistry