| 摘要 |
Providing a method for measuring concentration of nitrogen in a sample gas which can be continuously measured with high accuracy and sensitivity without using GC and wasting a sample gas. A sample gas is introduced into a discharge tube and the emission light generated by discharge is collected. The wavelength from the light specific to nitrogen is extracted, introduced into a detector and the nitrogen concentration present in the gas is continuously measured according to the detected light intensity. The wavelength for measuring the nitrogen concentration is 215 +- 2 nm, 226 +- 2 nm, 238 +- 2 nm, 242 +- 2 nm, 246 +- 1 nm, 256 +- 2 nm, 260 +- 2 nm, 266 +- 2 nm, 271 +- 1 nm, 276 +- 4 nm, 285 +- 2 nm, 249 +- 1 nm or 300 +- 2 nm. An independent claim is included for apparatus for measuring nitrogen in a gas. |
