Detection of the NO2 based on laser spectrum

YANG Yong; GAO Zhi-hui; CAO Zhi; YANG Jin-hui; LIN Huai-qin; CHEN Zi-cong

doi:10.3969/j.issn.1001-3806.2012.02.013

In order to design a NO2 detection system to monitor air pollutants effectively,and improve the air quality,the laser spectrum analysis technique was applied,in which the blue laser light source at centre wavelength of 443.2nm was selected according to the absorption spectrum and the strong absorption peaks of NO2 in the visible range,and an experimental platform for NO2 was built.The transmission spectrum of NO2 with different volume fractions were tested and analyzed,and the linear relationship between absorbance and the volume fractions of NO2 was obtained by means of the least-square linear fit.The results show that the experimental system can detect the NO2 with sensitivity on the order of approximately 10-4,and it has the good application value.

Detection of the NO2 based on laser spectrum

Corresponding author: GAO Zhi-hui, gaozhh@szu.edu.cn;

1. College of Electronic Science and Technology, Shenzhen University, Shenzhen 518060, China

Received Date: 2011-06-23

Accepted Date: 2011-09-13

Available Online: 2012-03-25

Abstract: In order to design a NO2 detection system to monitor air pollutants effectively,and improve the air quality,the laser spectrum analysis technique was applied,in which the blue laser light source at centre wavelength of 443.2nm was selected according to the absorption spectrum and the strong absorption peaks of NO2 in the visible range,and an experimental platform for NO2 was built.The transmission spectrum of NO2 with different volume fractions were tested and analyzed,and the linear relationship between absorbance and the volume fractions of NO2 was obtained by means of the least-square linear fit.The results show that the experimental system can detect the NO2 with sensitivity on the order of approximately 10-4,and it has the good application value.

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Reference (8)

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Detection of the NO2 based on laser spectrum

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References

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