Nitrogen dioxide monitoring using a blue LED

作者：Xu, Feng; Lv, Zhe; Lou, Xiutao; Zhang, Yungang; Zhang, Zhiguo^*

来源：Applied Optics, 2008, 47(29): 5337-5340.

DOI：10.1364/AO.47.005337

• DIFFERENTIAL OPTICAL-ABSORPTION
• CROSS-SECTIONS
• SPECTROSCOPY DOAS
• NO2
• TEMPERATURE
• SYSTEM
• NM

We report on a monitoring technique for nitrogen dioxide based on broadband absorption spectroscopy using a blue light-emitting diode (LED) operating around 465 mu. The technique is suited for real-time measurements of nitrogen dioxide clue to the use of a straightforward data evaluation method, limited interference From other gases, and a low degree of complexity compared with other real-time optical detection techniques having the same precision. Additionally, the use of a LED can reduce the cost. of nitrogen dioxide monitoring. Real-time measurements of nitrogen dioxide concentration were demonstrated Lit atmospheric pressure, which is of great interest for industrial nitrogen dioxide emission monitoring: a detection limit of about 3 ppm using a 50-cm-long gas cell with 2 s integration time was achieved.

• 出版日期2008-10-10
• 单位南京航空航天大学; 哈尔滨工业大学