Absolute density measurement of nitrogen dioxide with cavity-enhanced laser-induced fluorescence

2018 ◽  
Vol 27 (10) ◽  
pp. 100601
Author(s):  
Zheng-Hai Yang ◽  
Yong-Cheng Yang ◽  
Lian-Zhong Deng ◽  
Jian-Ping Yin
Keyword(s):  
Nitrogen Dioxide ◽  
Density Measurement ◽  
Laser Induced Fluorescence ◽  
Absolute Density

scholarly journals Laser-induced fluorescence-based detection of atmospheric nitrogen dioxide and comparison of different techniques during the PARADE 2011 field campaign

2019 ◽  
Vol 12 (3) ◽  
pp. 1461-1481 ◽  
Author(s):  
Umar Javed ◽  
Dagmar Kubistin ◽  
Monica Martinez ◽  
Jan Pollmann ◽  
Markus Rudolf ◽  
...  
Keyword(s):  
Nitrogen Dioxide ◽  
Limit Of Detection ◽  
Signal To Noise Ratio ◽  
Laser Induced Fluorescence ◽  
Field Campaign ◽  
Accuracy And Precision ◽  
New Instrument ◽  
Laser Pulse Repetition Rate ◽  
Set Up

Abstract. GANDALF (Gas Analyzer for Nitrogen Dioxide Applying Laser-induced Fluorescence), a new instrument for the detection of nitrogen dioxide based on the laser-induced fluorescence (LIF) technique, is presented in this paper. GANDALF is designed for ground-based and airborne deployment with a robust calibration system. In the current set-up, it uses a multi-mode diode laser (447–450 nm) and performs in situ, continuous, and autonomous measurements with a laser pulse repetition rate of 5 MHz. The performance of GANDALF was tested during the summer of year 2011 (15 August–10 September) in a field experiment at Kleiner Feldberg, Germany. The location is within a forested region with an urban influence, where NOx levels were between 0.12 and 22 parts per billion by volume (ppb). Based on the field results, the limit of detection is estimated at 5–10 parts per trillion by volume (ppt) in 60 s at a signal-to-noise ratio (SNR) of 2. The overall accuracy and precision of the instrument are better than 5 % (1σ) and 0.5 %+3 ppt (1σ min−1), respectively. A comparison of nitrogen dioxide measurements based on several techniques during the field campaign PARADE 2011 is presented to explore methodic differences.

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