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Quality Characteristics of Distilled Liquor Produced Using Ipguk (Koji) During Aging

입국으로 제조한 증류주의 숙성에 따른 품질 특성

  • Received : 2014.06.07
  • Accepted : 2014.10.08
  • Published : 2014.12.31

Abstract

This study aimed to investigate the aging of liquor brewed with fermented wine using ipguk (koji) in a jar (JA) and stainless steel container (SC), which are generally used in Korea, and to review the characteristics of the liquors as a function of aging time. The initial alcohol content was 39.8-40.9%, and gradually decreased in the JA and SC as the aging time increased. In the case of fusel alcohols, the n-propanol, isobutanol, and isoamyl alcohol contents did not increase with increasing aging time, in the cases of both JA and SC. The A/B (isoamyl alcohol/isobutyl alcohol) ratio was similar under reduced pressure (RP) and atmospheric pressure (AP), at 1.32-135. The A/P (isoamyl alcohol/n-propanol) and B/P (isobutyl alcohol/n-propanol) ratios were 2.17-2.22 and 1.62-1.68, respectively. During the early stages of distillation, under RP, the isoamyl alcohol content was the greatest, followed by isobutyl alcohol and ethyl palmitate. Under AP, the isoamyl alcohol content was the greatest followed by decanoic acid, ethyl palmitate, and isobutyl alcohol. The highest sensory score under RP, 60 cmHg, was $6.98{\pm}0.28$.

Keywords

distilled liquor;ipguk (koji);jar;stainless steel vessel

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Cited by

  1. A Study of Optimal Conditions in Distillation for Production of Schisandra Chinensis Fruit Spirits vol.16, pp.9, 2015, https://doi.org/10.5762/KAIS.2015.16.9.6142

Acknowledgement

Supported by : 농림축산식품부