Quality Evaluation and Fourier Transform Infrared (FTIR) Spectroscopy Characterization of Vodka Produced from Malted and Un-malted Potatoes Using Saccharomyces cerevisiae (MK680910)
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引用次数: 0
Abstract
The present study aims to evaluate the suitability of un-malted (raw version) and malted (sprouted) potato variety Kufri Pukhraj for the production of vodka using the brewing yeast strain Saccharomyces cerevisiae (MK680910). Both un-malted and malted potatoes were subjected to 72 h of fermentation and valuated for changes in total sugars, reducing sugars and ethanol conversion. Results showed that with an increase in fermentation time from 24 to 72 h, the content of total and reducing sugars decreased significantly (p < 0.05), resulting in a significant increase in the ethanol concentration. After 72 h of fermentation, malted potato produced the best results, with a greater substrate-to-product conversion (0.47 g ethanol g−1 reducing sugars), a higher fermentation yield (91.97%), and higher ethanol content (9.82 percent v/v). Following fermentation, double distillation, clarification with activated charcoal, blending, and sensory analysis with different flavours were conducted. Vodka with ethanol concentration of 41.3% v/v was produced having 82.6 proof. Vodka blended with lemon was found to be more preferred with mean score of 8 and was of standard quality. The structural characterisation of the FTIR spectrum band at 1000 cm−1 analysis correlates to C-O stretching in the volatile components and showed the presence of ethanol in the vodka.
期刊介绍:
Potato Research, the journal of the European Association for Potato Research (EAPR), promotes the exchange of information on all aspects of this fast-evolving global industry. It offers the latest developments in innovative research to scientists active in potato research. The journal includes authoritative coverage of new scientific developments, publishing original research and review papers on such topics as:
Molecular sciences;
Breeding;
Physiology;
Pathology;
Nematology;
Virology;
Agronomy;
Engineering and Utilization.