Nitrous oxide (N2O), carbon dioxide (CO2) and methane (CH4) are considered to be very powerfull greenhouse gases. These gases reflect in the atmosphere the infrared radiation from the earth influencing the global heat budget. Continuously measuring gives insight in the source of the different gases. We custom configured a 450-GC based system for analyzing all three gases in one run in a matrix of atmospheric air containing water vapor. 450-GC 多功能氣相色譜儀