| 摘要 |
PROBLEM TO BE SOLVED: To improve the sensitivity and reproducibility of a foul odor-measuring device. SOLUTION: The foul odor-measuring device introduces sample gas from a sample gas channel 1 to a capturing pipe 3, captures C3-C20 in the sample gas to the capturing pipe 3, then eliminates water in the sample gas by a dehumidifier 5, further captures smaller foul substances than C3 in the sample gas into capturing pipes 7 and 9, and then introduces dry nitrogen gas from the sample gas channel 1 to the capturing pipes 3, 7, and 9. The capturing pipe 3 is connected to a gas sensor part 13 by valves V1 and V2, nitrogen. gas is supplied to the capturing pipe 9, the temperature of the capturing pipe 3 is increased by a heater for disconnecting the foul substances being captured by the capturing pipe 3, and the foul substances are introduced to the gas sensor part 13 along with the nitrogen gas. After that, the valves V2 and V3 are switched, the temperature of the capturing pipes 7 and 9 is increased by the heater for disconnecting the foul substances being captured by the capturing pipes 7 and 9, and the foul substances are introduced to the gas sensor part 13 along with the nitrogen gas via a bypass channel 11.
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