This study aims to understand the correlation between odor intensity and dilution factor using the Air Dilution Olfactory Method, which is suggested in the Standard Method of Odor Compounds, by measuring odor intensity and dilution factor for fatty acids and i-butyl alcohol. For the measurement, 18 panel members were selected through a panel test, and odor intensity and dilution factor by substance produced from the selected panel were estimated. The estimation showed that the correlation of odor intensity with dilution factor for a fatty acids and i-butyl alcohol can be reasonably expressed by the equation I = A·log D + 0.5 (I : odor Intensity, D : dilution factor, A : material constant). The material constant was in order of propionic acid 2.0709, n-butyric acid 1.6006, n-valeric acid 1.3369, i-valeric acid 1.182, i-butyl alcohol 1.4326. The geometric average of increased dilution factor for the 5 compounds is about 4.8 time, 3.0 time for propionic acid and 7.0 tme for i-valeric acid due to odor intensity 1 increasing. It is suggested that the result of this study could be used as a base data for research on measures to improve the regulation standards for complex odor concentrations at a boundary sites in operation.

1. 서 론
 2. 연구 방법
  2.1 악취강도 및 희석배수 실험방법
  2.2 악취강도와 희석배수와의 관계(식)
 3. 결과 및 고찰
  3.1 i-뷰틸알코올의 농도와 악취강도 실험결과
  3.2 지방산 4종의 희석배수와 악취강도 실험결과
  3.3 i-뷰틸알코올과 지방산 4종의 희석배수와 악취강도상관관계
  3.4 i-뷰틸알코올과 지방산 4종의 악취강도1~5도에 해당하는 희석배수 산정
  3.5 지정악취물질의 악취강도 변화에 따른 희석배수 변화
 4. 결 론
 References

• 김선태(대전대학교 환경공학과) | Sun-Tae Kim
• 한진석(안양대학교 환경에너지공학과) | Jin-Seok Han Corresponding author