Chinese Optics Letters, 2013, 11 (6): 063001, Published Online: May. 31, 2013
In situ measurements of atmospheric NO2 using incoherent broadband cavity-enhanced absorption spectroscopy with a blue light-emitting diode Download: 609次
Abstract
We describe the application of incoherent broadband cavity-enhanced absorption spectroscopy (IBBCEAS) for in situ measurements of atmospheric NO2 using a blue light-emitting diode. The mirror reflectivity is determined by the transmitted intensity variation through the cavity caused by Rayleigh scattering. Concentrations of atmospheric NO2 (1 to 35 ppbv) during the seven-day period are retrieved from the absorption spectra. The IBBCEAS measurement data are compared with those of a commercial long path differential optical absorption spectroscopy. The linear regression has a correlation coefficient and a slope of 0.983 and 0.975, respectively.
Liuyi Ling, Pinhua Xie, Min Qin, Wu Fang, Yu Jiang, Renzhi Hu, Nina Zheng. In situ measurements of atmospheric NO2 using incoherent broadband cavity-enhanced absorption spectroscopy with a blue light-emitting diode[J]. Chinese Optics Letters, 2013, 11(6): 063001.