Analysis of trace amounts of carbon dioxide, oxygen and carbon monoxide in nitrogen using dual capillary columns and a pulsed discharge helium ionisation detector

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• 作者：M. Janse van Rensburg ; A. Botha ; E. Rohwer
• 关键词：Carbon dioxide ; Oxygen ; Carbon monoxide ; Nitrogen ; Validation ; Uncertainty
• 刊名：Journal of Chromatography A
• 出版年：2007
• 期刊代码：47_00219673
• 类别：ch
• 出版时间：5 October 2007
• 卷：1167
• 期：1
• 页码：102-108
• 文件大小：397 K

摘要

Gas mixtures of trace amounts of carbon dioxide (CO₂), dioxygen (O₂), and carbon monoxide (CO) in dinitrogen (N₂) were separated and quantified using parallel dual capillary columns and pulsed discharge helium ionisation detection (PDHID). The detection limits (9 × 10⁻⁹ mol mol⁻¹ for CO₂, 7 × 10⁻⁹ mol mol⁻¹ for O₂ and 37 × 10⁻⁹ mol mol⁻¹ for CO) were lower than those reported previously for similar methods. Uncertainties were calculated and results were validated by comparison of the CO and CO₂ results with those obtained using conventional methods. The method was also used to analyse nitrogen, carbon dioxide and carbon monoxide in oxygen.