n-Butanol is used to assess how odor intensity correction affects judges’ evaluation of the odor intensity based on the concentration. The odor intensity correction effect is verified by using three types of test solutions which are used for the selection of judges based on their concentration levels. The correction effect is statistically analyzed according to gender, odorant type, and concentration on the group and individual level. The result shows that n- Butanol correction affects the odor intensity evaluation for three odorants in different ways. In most cases, n- Butanol correction increases the panelists' sensitivity to the odor intensity change, and results to be close to the theoretical value. The female panelists can more accurately evaluate the sourness intensity of acetic acid after n- Butanol correction. All panelists regardless of gender can more accurately evaluate the fishiness intensity of trimethylamine after n-Butanol correction. For evaluating the caramel smell intensity of methylcyclopentenolone, a full panel without n-Butanol correction is recommended. Therefore, n-Butanol correction should be included in the process of judge selection and the odor intensity assessment.

Abstract
1. Introduction
2. Materials and methods
    2.1 Reagents
    2.2 Pre-selection of panelist
    2.3 Panelist selection
    2.4 Judgment procedure
3. Results and discussion
    3.1 Perceived n-Butanol odor intensity
    3.2 n-Butanol correction effect on acetic acid odorintensity assessment
    3.3 n-Butanol correction effect on trimethylamineodor intensity assessment
    3.4 n-Butanol correction effect on methylcyclopentenoloneodor intensity assessment
4. Conclusion
References

• 김선태(대전대학교 환경공학과) | Sun-Tae Kim (Department of Environmental Engineering, Daejeon University) Corresponding author
• Hui LI(엔버스)
• 김하나(대전대학교 환경공학과) | Hana Kim (Department of Environmental Engineering, Daejeon University)