Methods for testing hydrogen purity?
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The purity requirement for hydrogen is above 99.9%. Our unit uses chromatographic thermal island analysis for testing; however, the manufacturer recommends that chromatographic flame analysis be used to obtain accurate results for high-purity hydrogen. I would like to know: which testing method do you use? Thank you. I’m not familiar with lab tests.
For hydrogen with extremely high purity, it is not possible to directly measure its purity; instead, only the amount of impurities in the hydrogen gas can be determined, and the purity of hydrogen is then calculated using subtraction. This is the standard analytical method. To determine what impurities are present in hydrogen, TOC can be used to detect inorganic impurities, while FID can be used to detect organic impurities.