Open AccessInfluence factors of quantitative analysis precision of greenhouse gases and carbon isotope ratio based on infrared spectroscopy
Author(s) -
Xiangxian Li,
Liang Xu,
Mingliang Gao,
Tong Jingjing,
Min Feng,
Jianguo Liu,
Wenqing Liu
Publication year - 2015
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.64.024217
Subject(s) - fourier transform infrared spectroscopy , greenhouse gas , isotope , materials science , infrared , analytical chemistry (journal) , sensitivity (control systems) , spectroscopy , fourier transform spectroscopy , carbon fibers , environmental science , chemistry , optics , environmental chemistry , physics , nuclear physics , geology , oceanography , quantum mechanics , composite number , composite material , engineering , electronic engineering
The quantitative analysis based on Fourier transform infrared (FTIR) technology is affected by the temperature and pressure properties of gas and the H2O cross section, so the applications of FTIR technology to high-precision measurement area of the greenhouse gases and isotope ratio are restricted. Firstly, the methods of correcting the gas property sensitivities and H2O cross sensitivity are studied, then the standard gas measurements are corrected with these sensitivity correcting functions established through experimental study. The standard deviations of CO, CO2, N2O, CH4 and δ13CO2 are all improved after correcting the sensitivities, and reduced by 1.80-3.38 times. These studies are significant for the applications of FTIR technology to the high-precision measurement area of greenhouse gases and isotope ratio.