Why Nitrogen Gas Generators use the Gas Chromatography Column Gas Chromatography column was a technique of separation by which the mixture of isolated volatile components depended on the mode of the partition between the stationary phase and the flowing mobile phase. The Nitrogen Gas Generators has gained the most important tools in the subject of Chemistry due to its effectiveness and simplicity. It was the technique that was used for the separation of the chemical components of the sample mixture and then it detects them for their presence or absence of the mixture.