| 摘要 |
PURPOSE: A measuring method of nitrogen in a gas and its apparatus are provided to continuously measure a concentration of nitrogen with good sensitivity without wasting a sample gas. CONSTITUTION: At least one wavelength for measuring a concentration of nitrogen according to the intensity of a light generated by discharge, is selected from a group consisting of 215 plus/minus 2nm, 226 plus/minus 2nm, 238 plus/minus 2nm, 242 plus/minus 2nm, 246 plus/minus 2nm, 256 plus/minus 2nm, 260 plus/minus 2nm, 266 plus/minus 2nm, 266 plus/minus 2nm, 271 plus/minus 1nm, 276 plus/minus 4nm, 285 plus/minus 2nm, 294 plus/minus 1nm, and 300 plus/minus 2nm. Thereby, the concentration of the nitrogen is analyzed without adding another gas and the cost for the analysis is reduced.
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