Odor Threshold and Agreeability of Aroma Components of Yakju

약주(藥酒) 향기성분(香氣成分)의 역치와 쾌감도(快感度)

The odor threshold and agreeability of aroma components in Korean Yakju were measured in Null-Yakju, 19% ethyl alcohol solution, $20^{\circ}C$ distilled water and $50^{\circ}C$ distilled water by 20 panels. The measurement of the odor threshold in Null-Yakju was as follows: Formal-dehyde 5ppm, acetaldehyde 20ppm, ethylacetate 30ppm, ethyl alcohol 5g/l, acetone 7ppm, diacetyl 0.2ppm, n-propanol 20ppm, iso-butanol 80ppm, iso-amyl alcohol 10ppm and dimethyl sulfide 2ppm were found. The most agreeability of amyl alcohol, ethyl alcohol and acetaldehyde were $80{\sim}350ppm$, $2.6{\times}10^4{\sim}1{\times}10^5ppm$ and $75{\sim}160ppm$.

약주(藥酒)의 향기성분(香氣成分)인 formaldehyde, acetaldehyde, ethyl acetate, acetone, diacetyl, n-propanol, iso-butanol, iso-amyl alcohol, dimethylsulfide, ethanol의 역치를 유사(類似) 약주(藥酒)와 18% ethanol 액(液) 및 $20^{\circ}C$와 $50^{\circ}C$의 증류수중에서 측정(測定)하고 이들 성분(成分)의 각농도(各濃度)에서의 쾌감도(快感度)를 측정(測定)하였다. 유사약주(類似藥酒)에서의 역치는 각각 5,20,30,7,0.2,20,80,10,2ppm 및 5g/l이었으며 $20^{\circ}C$ 증류수중에서의 역치는 각각(各各) 5,10,20,7,0.15,75,7.5,2ppm 및 5g/l 이었고 iso-amyl alcohol은 $80{\sim}350ppm$에서 최고 쾌감(快感)을 나타낸 후 520ppm 이상에선 불쾌감(不快感)을 나타냈다. Ethanol은 $10^5ppm$, n-propanol은 50ppm까지는 쾌감(快感)을 나타냈으며 iso-butanol은 220ppm, diacetyl은 1ppm을 초과하면 불쾌감(不快感)을 나타냈으며 iso-butanol은 260ppm 초과의 경우 극도의 불쾌감(不快感)을 나타냈다. Ethyl acetate는 함량(含量)이 증가함에 따라 쾌감(快感)이 좋았으나 250ppm이 초과하면 쾌감(快感)이 감소(感少)하는 경향이었으며 acetaldehyde는 110ppm에서 최고(最高) 쾌감(快感)을 보였다.