A Flow-Injection System Coupled to a Micro-Guard Cartridge for Monitoring a Vinification Process

作者：Vidigal Susana S M P; Rangel Antonio O S S^*

来源：Analytical Sciences, 2014, 30(11): 1057-1062.

DOI：10.2116/analsci.30.1057

• Ethanol
• sugars
• port wine
• synthetic grape juice
• automation

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.

• 出版日期2014-11