| 摘要 |
PROBLEM TO BE SOLVED: To provide a luminous-reaction measuring apparatus whose measurement accuracy of chemiluminescence is high. SOLUTION: In the luminous-reaction measuring apparatus 10, a sample gas (NO) and an oxidizing gas (O3) are chemically reacted inside a reaction chamber 2, and the intensity of the chemiluminescence generated in their reaction is detected by a photodetector 32. The apparatus 10 is provided with a light transmission window 3 by which light due to the chemiluminescence is entered into the photodetector 32, a sample-gas introduction part 6 by which the sample gas is introduced into the reaction chamber from a direction perpendicular to the window 3, an oxidizing-gas introduction part 8 by which the oxidizing gas is introduced into the reaction chamber from a direction nearly at right angles to the introduction direction of the sample gas in such a way that it collides with the sample gas introduced from the introduction part 6 and a gas evacuation part 12 by which a gas generated by the chemical reaction of the sample gas with the oxidizing gas is discharged to the outside of a system from the reaction chamber. The introduction part 6 is deviated from the center L of the reaction chamber to a direction becoming distant from the arrangement and installation position of the evacuation part 12.
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