Hydrogen Gas - an overview | ScienceDirect Topics
Hydrogen gas by volume 10 mL was collected in this process. Collected gas injected into a gas chromatograph showed two major s. The first eluted at retention time 0.94 min, which corresponds to the hydrogen reference at 0.92 min shown in Fig. 27. The purity of hydrogen gas is close to 99.99% generated by HEC.