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| 一种在线同时分析一氧化氮和二氧化氮含量的方法 |
| On-line simultaneous analysis of nitric oxide and nitrogen dioxide |
| 投稿时间：2018-03-05 |
| DOI：10.3969/j.issn.1005-5630.2018.02.003 |
| 中文关键词: 多通道快速质谱 在线定量分析 氮氧化物 |
| 英文关键词:multi-channel fast mass spectrometry on-line quantitative analysis nitrogen oxides |
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| 中文摘要: |
| 氮氧化物（NOx）在工业生产和科学研究中具有重要的应用。通过多通道快速质谱碎片扣除的方法来测定气体中氮氧化物的含量，旨在实现在线多通道同时快速准确分析一氧化氮（NO）和二氧化氮（NO2）。方法的稳定性较好，一氧化氮和二氧化氮的稳定性相对标准偏差分别小于1.07%和1.23%。该方法具有快速分析的特点，30 s内完成流路切换、进样和样气平衡到检测报告样气组分的全部过程。该方法已分别用于单通道和多通道切换检测氮氧化物含量，所得结果准确。结果表明，多通道质谱干扰离子扣除法可以成功地应用于气体中NOx含量的快速多点动态监测。 |
| 英文摘要: |
| Nitrogen oxides(NOx) plays a very important role in the industrial applications and scientific research.To meet the requirements of multi-channel on-line analysis of nitric oxide and nitrogen dioxide simultaneously,a fast analysis method based on fragment ion subtraction with on-line mass spectrometry for determination of nitrogen oxides in gases was evaluated.The relative standard deviation of the stablility was less than 1.07% for nitric oxide and 1.23% for nitrogen dioxide,respectively.The analysis including stream switching,sample introduction and settling time can be finished within 30 seconds per sample.The developed method was validated for the analysis of NOx based on a single and multi-channel sampling system.The results confirmed that this rapid,feasible,multi-point dynamic monitoring technique can be suitable for the analysis of NOx in gases in the various areas. |
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