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Metal 3D-printed catalytic jet and flame ionization detection for in situ trace carbon oxides analysis by gas chromatography
journal contributionposted on 2023-05-20, 12:00 authored by Gras, R, Hua, Y, Luong, J, Qiao, P, Yang, XG, Yang, P
A gas chromatographic approach for the determination and quantification of trace levels of carbon oxides in gas phase matrices for in situ or near-line/at-line analysis has been successfully developed. Catalytic conversion of the target compounds to methane via the methanation process was conducted inside a metal 3D-printed jet that also acted as a hydrogen burner for the flame ionization detector. Modifications made to a field transportable gas chromatograph enabled the leveraging of advantaged microfluidic-enhanced chromatography capability for improved chromatographic performance and serviceability. The compatibility with adsorption chromatography technology was demonstrated with in-house constructed columns. Sustained reliable conversion efficiencies of greater than 99% with respectable peak symmetries were attained at 400Â°C. Quantification of carbon monoxide and carbon dioxide at a parts-per-million level over a range from 0.2Â ppm to 5% v/v for both compounds with a respectable precision of less than 3% relative standard deviation for peak area (nÂ =Â 10) and a detection limit of 0.1Â ppm v/v was achieved. Linearity with correlation coefficients of R2 greater than 0.9995 and measured recoveries of >99% for spike tests were achieved. The 3D-printed steel jet was found to be reliable and resilient against potential contamination from the matrices owing to the in situ backflushing capability.
Publication titleJournal of Separation Science
Department/SchoolSchool of Natural Sciences
Place of publicationGermany
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