Acta Optica Sinica, Volume. 32, Issue 4, 401002(2012)
Measurement and Analysis Method of the Complex Refractive Index on Water-Soluble Aerosol by FTIR
Studies indicate that current composition of atmospheric aerosol is complex, and its water-soluble ions affect air quality. The ions can produce significant negative effect on the human health. Therefore, rapid and reliable detection of water-soluble ion is an important research work in environmental science. Take SO2-4 ion as an example, the extinction coefficient of water-soluble aerosol is measured by Fourier transform infrared spectroscopy (FTIR) technology, and the complex refractive index N is also calculated through theoretical analysis. By measuring the mass extinction cross section k and extinction coefficient α of the atmospheric aerosol water-soluble ion, the imaginary part ni of the complex refractive index N is calculated according to the extinction coefficient α and the real part nr of the complex refractive index N is also calculated by using the KK (Kramers-Kronig) relationship. The experimental results are also analyzed and discussed.
Get Citation
Copy Citation Text
Feng Mingchun, Gao Minguang, Xu Liang, Wei Xiuli, Cheng Siyang, Tong Jingjing, Li Xiangxian, Jin Ling, Li Sheng, Jiao Yang. Measurement and Analysis Method of the Complex Refractive Index on Water-Soluble Aerosol by FTIR[J]. Acta Optica Sinica, 2012, 32(4): 401002
Category: Atmospheric Optics and Oceanic Optics
Received: Oct. 23, 2011
Accepted: --
Published Online: Feb. 8, 2012
The Author Email: Mingchun Feng (mcfeng@aiofm.ac.cn)