The purpose of this study is to investigate that the evaluation of odor analysis is affected by the classification of the agency and the general properties of the odor analysts, including gender, age, smoking behaviour, the number of participation in odor assessment, etc, so as to improve reliability and skills in terms of the result of complex odors by the air dilution methods. The sample for complex odor used the field sample which aimed at the odor analysts in the agency. The general characterizations of the odor analysts have affected the results of the odor analysis. The values of odor evaluation obtained by female odor analysts were more delicate than male, and the value of the result was reduced when above 40 s analysts conducted the evaluation. Moreover, Non-smokers perceived odor more sensitive than smokers. The more experience of odor analysis odor analysts had, The less values of the result were assessed. On the other hand, there are no differences in the value of odor evaluation depending on theclassification of institutions that participate in odor investigation. In conclusion, the selection of odor analysts considered gender, age, smoking behavior, and experience may be required to determine the improved reliability of data in odor evaluation. Ideally, Non-smokers 20~40 years old who have no dysfunction for the olfactory sense can be suitable for being optimal odor analyst.

This study attempts to identify whether Phenethylamine (PTA), having a similar smell to fish malodor, is appropriate as a replacement of Trimethylamine (TMA). In a continuous measurement test, the odor intensity of both reagents TMA and PTA measured within 5 minutes showed between 0.4~0.7, indicating a dramatic reduction in olfactory sense, while the measurement test conducted after olfactory recovery did not represent much decrease. The result shows that both TMA and PTA have odors that stay long, but are judged to be inappropriate as a replacement as they stimulate the olfactory sense of the panel and give direct impact on the panel"s next judgement.

Two study were carried out to get basic data to improve the olfactory odor estimation method. The first study was to observe the odor intensity of reagents used to select the panel in Korea and Japan. And the second study was to compare the ratio of successful applicants of panel selection between Korea and Japan. As a results, it was observed that the average odor intensity of panel selection reagents in Korea is 3.8 degree and the one of Japan 1.8 degree. As the ratio of successful applicants of Japan method 88% is higher then the one of Korea mothed 30%, it was estimated that Korea method is more strict than Japan method.