Study on Evaluation Methodology for Complex Odor using Odor Sensor. (III). Continuous Measurement of Offensive Odors in the Field by Odor Sensor.:Continuous Measurement of Offensive Odors in the Field by Odor Sensor

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Correlations between response values of an odor sensor and the concentration of malodorous substances were invenstigated using the semi-conductor type odor sensor (XP-s2gS: for sulfur compounds). Odors were continuously measured in a stainless-steel chamber or outside near the emission source for a week. Characteristics of the odor sensor were also studies.<BR>The results show that the response values of the odor sensor can be predicted from the odorants concentrations in the field if sensitivity check and zero-level adjustment of the odor sensor are periodically performed, and that the concentrations of malodorous substances can also be predicted from the response values of the odor sensor when the ratios of the concentrations of malodorous substances are roughly constant. During the measurement of odor in the chamber, the odor sensor was also found to be useful for detecting byproducts that were generated from a deodorant filter of an air cleaner.<BR>After the odor sensor was used for several months, it was found that the linear regression line between response values of the odor sensor and odor concentrations shifted parallely because of insufficient zero-level adjustment, and that the sensitivity of the odor sensor in a high concentration range decreased because of the adsorption of substances by the odor sensor of the instrument.
社団法人大気環境学会の論文