| 摘要 |
PROBLEM TO BE SOLVED: To correctly measure strength of smell of offensive smell components even for the smell of a sample in which the offensive smell components in very small quantity seem to be mixed with main components. SOLUTION: For preliminary measurement, sample gas as subject to be measured is sent to a collecting tube 16 to make components of the sample adsorbed by adsorbent 16a, and valves 12 and 13 are changed over to introduce carrier gas passing the collecting tube 16 to a sensor cell 21. At this time, temperature in the collecting tube 16 is increased in stages by prescribed temperature width each time. Change of detected output of a smell sensor 21a at each temperature is determined, and temperature at which change is generated is memorized in a memory 25. For each kind of component in the sample gas, discharged temperature from the collecting tube 16 is grasped, and regular measurement for the sample gas is executed after that. In this measurement, after the sample components are collected to the collecting tube 16, temperature memorized in the memory 25 only is set in stages to heat the collecting tube 16. Each component is separately concentrated to be detected by the smell sensor 21a. COPYRIGHT: (C)2005,JPO&NCIPI
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