首页|Helium impurity measurement in hydrogen isotope mixtures by gas chromatography
Helium impurity measurement in hydrogen isotope mixtures by gas chromatography
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NETL
NSTL
Elsevier
Traditional gas chromatography (GC) often encounters the challenge in accurately detecting helium content in hydrogen isotope gases due to interference from hydrogen isotopes. To address this issue, a novel method utilizing a pre-treatment column (PC) filled with Pd/Al2O3 particles to eliminate hydrogen isotopes has been proposed. Experimental results show that the PC can completely adsorb hydrogen isotopes, leading to the disappearance of hydrogen isotope peak in the chromatogram. After the equipment of PC, the detection limit of helium is below 2 ppm at a sampling pressure of 100 kPa. Compared to the original measurement method, the PC-equipped GC reduces the measurement uncertainty of helium by 1 to 2 orders of magnitude. Moreover, the equipment of PC does not hinder the daily operation and maintenance of GC, and the PC can be consecutively used for over 20 runs.
NETL
NSTL
Elsevier
