In-Line Combustion System for the Measurement of δ13C-CH4 in Gas Reference Materials Using Optical Isotope Ratio Spectroscopy
Measurements of the stable carbon isotope ratio in methane (δ13C-CH4) are used in determining the source of CH4 emissions on local, regional, and global scales. To achieve the required level of data comparability for atmospheric monitoring networks, accurate gas reference materials of δ13C-CH4 in air are required with high levels of reproducibility. We describe a method to determine the δ13C-CH4 o
