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Sensors 2014, 14(9), 16258-16273; doi:10.3390/s140916258

Monitoring and Evaluation of Alcoholic Fermentation Processes Using a Chemocapacitor Sensor Array

1
Department of Microelectronics, Institute of Nanoscience and Nanotechnology (INN), NCSR 'Demokritos' Athens 15310, Greece
2
Department of Physical Chemistry, Institute of Nanoscience and Nanotechnology (INN), NCSR 'Demokritos' Athens 15310, Greece
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 17 June 2014 / Revised: 2 August 2014 / Accepted: 27 August 2014 / Published: 2 September 2014
(This article belongs to the Section Chemical Sensors)
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Abstract

The alcoholic fermentation of Savatiano must variety was initiated under laboratory conditions and monitored daily with a gas sensor array without any pre-treatment steps. The sensor array consisted of eight interdigitated chemocapacitors (IDCs) coated with specific polymers. Two batches of fermented must were tested and also subjected daily to standard chemical analysis. The chemical composition of the two fermenting musts differed from day one of laboratory monitoring (due to different storage conditions of the musts) and due to a deliberate increase of the acetic acid content of one of the musts, during the course of the process, in an effort to spoil the fermenting medium. Sensor array responses to the headspace of the fermenting medium were compared with those obtained either for pure or contaminated samples with controlled concentrations of standard ethanol solutions of impurities. Results of data processing with Principal Component Analysis (PCA), demonstrate that this sensing system could discriminate between a normal and a potential spoiled grape must fermentation process, so this gas sensing system could be potentially applied during wine production as an auxiliary qualitative control instrument. View Full-Text
Keywords: alcoholic fermentation spoilage; gas sensing system; chemocapacitors; PCA alcoholic fermentation spoilage; gas sensing system; chemocapacitors; PCA
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Oikonomou, P.; Raptis, I.; Sanopoulou, M. Monitoring and Evaluation of Alcoholic Fermentation Processes Using a Chemocapacitor Sensor Array. Sensors 2014, 14, 16258-16273.

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