Measurement of SF6 using GC-ECD: A comparative study on the utilization of CO2-N2 mixture and CH4-Ar mixture as a make-up gas

Abstract

Comparison of 10% CO2-N2 and 5% CH4-Ar gas mixture as a make-up of gas chromatography with electron capture detection (GC-ECD) for the measurement of sulfur hexafluoride (SF6) was investigated. It was found that 10% CO2-N2 shows the make-up characteristic comparable to 5% CH4-Ar. Thus, 10% CO2-N2 is considerable as an alternative to 5% CH4-Ar.