A method was developed to detect small amounts of carbon monoxide and dioxide gases using reaction-gas chromatography. By studying factors like gas speed and temperature, researchers found the best conditions for converting CO and CO2 to methane. The ideal settings were a gas speed of 40-60mL/min, reaction temperatures of 650℃ for CO and 600℃ for CO2, and a separation temperature of 60℃. The method had a low variability of less than ±5% and can also be used to measure carbon in metals.