| 摘要 |
<p>PURPOSE:To enable the miniaturization of the titled analyser by substantially removing an interference removal cell, by sealing interference gas in either one of a reference cell and an inert gas sealed cell corresponding thereto. CONSTITUTION:A reference cell 4 (4a, 4b) and an inert gas sealed cell 5 (5a, 5b) are provided in a rotor 3 and, when gases to be measured are CO2 and CO, CO2 is sealed in the cell 4a and CO in the cell 4b. Herein, in measuring CO2, CO acts as interference gas and, similarly, in measuring CO, CO2 acts as interference gas. Then, CO is further sealed in the cell 4a (or the inert gas sealed cell 5a corresponding to the cell 4a) as interference gas. The concn. of this CO is set so that the reduction ratio of measuring light, which passes a sample cell 2 and the inert gas sealed cell 5a to reach a detector 5, becomes almost equal to that of reference light reaching the detector 5 through the sample cell 2 and the cell 4a. Similarly, CO2 is sealed in the cell 4b (or the cell 5b) as interference gas.</p> |
