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- E-ISSN 2288-8985
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Development of analysis method for high purity nitrogen using GC-FID/Methanizer
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2022, v.35 no.6, pp.249-255
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(2022). Development of analysis method for high purity nitrogen using GC-FID/Methanizer. Analytical Science and Technology, 35(6), 249-255.
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Abstract
In this study, a new method for the analysis of high-purity nitrogen was developed. A gas chromatography-flame ionization detector (GC-FID) was used for purity analysis. Certified reference materials (CRMs) at a level of 3 μmol/mol of carbon monoxide (CO), carbon dioxide (CO2), and methane (CH4), which may exist in high-purity nitrogen, were prepared using the gravimetric method, and these CRMs were used for purity analysis. In this new method, ultra-high-purity and high-purity nitrogen were used as carrier gases. The impurities in high-purity nitrogen were quantitatively analyzed by comparing the differences in the area values of the GC chromatograms of the prepared CRMs. We purchased liquid nitrogen and three bottles of nitrogen gas, which were produced by three different manufacturers, using high-purity nitrogen. Furthermore, to validate the developed purity analysis method, the fraction of impurities in high-purity nitrogen was compared with the results of the typical purity analysis method. The comparison results were consistent within the expanded uncertainties (k = 2).
- keywords
- gas chromatography #1, certified reference material (CRM) #2, gravimetric preparation method #3, purity analysis #4, high purity nitrogen #5
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