The labeled magnitude scale (LMS) was proposed as the magnitude estimation of perceived odor intensity while the direct olfactory method is a basis of odor evaluation. Six chemicals (pyridine, ethanol, ethyl acetate, acetone, trimethylamine, and β-phenylethyl alcohol) were tested to demonstrate the limitation of the current odor intensity scale and the possibility of the alternative method. The 6-point odor intensity reference scale, which is wildly used in the field, has the inevitable limitation of the perceived magnitude of odor intensity. It has failed to express the magnitude objectively when odor intensity increased and the magnitude scale was limited. It was experimentally proven that LMS presents the function of the existing method and effectively evaluates the wide range of odor intensity.

Abstract
 1. 서 론
 2. 실험방법
  2.1 평가자 선정
  2.2 실험 대상물질
  2.3 평가 및 분석
 3. 실험결과 및 고찰
  3.1 물질별 농도에 따른 악취강도 변화
  3.2 6단계악취강도표시법의 한계
  3.3 LMS 적용가능성
 4. 결 론
 References

• 김대근(서울과학기술대학교 환경공학과) | Daekeun Kim Corresponding author
• 이효진(경기도보건환경연구원 대기연구부) | Hyojin Lee