根据ISO 14687级D标准进行纯度分析的多元气体标准
Verena Reiter1, Lea A Brandner1, Sebastian Scheikl1
1HyCentA Research GmbH, Inffeldgasse 15, Graz A-8010, Austria.
Analytical chemistry
|March 3, 2026
概括
对于关键的ISO 14687级D污染物,除甲和酸外,用于纯度分析的多元组件气体标准是稳定的. 这项研究支持燃料电池汽车可靠的质量控制.
科学领域:
- 分析化学 分析化学
- 气相色谱是一种气相色谱.
- 频谱学是一种光谱学.
背景情况:
- 国际标准ISO 14687规定了燃料的严格杂质限值,特别是燃料电池车辆的D级.
- 准确的分析方法和经过认证的气体标准对于确保符合纯度的要求至关重要.
- 为每个污染物准备单独的参考标准是昂贵和耗时的.
研究的目的:
- 评估商业准备的含有ISO 14687级D污染物在中的多元组件气体标准的长期稳定性.
- 提供支持使用多元组件标准用于常规纯度分析的数据.
- 在混合气体标准中识别稳定性较差的污染物.
主要方法:
- 离子-分子反应质谱法 (IMR-MS)
- 电子冲击质谱仪 (EI-MS) 是一种电子冲击质谱仪.
- 里埃变换红外光谱法 (FTIR) 是一种方法.
主要成果:
- 惰性和半活性污染物 (He,Ar,CH4,C3H8,CO2,CO,COS,化合物) 的稳定性超过6个月.
- 氨 (NH3) 度在60天的平衡期后稳定.
- 甲 (CH2O) 和酸 (CH3OOH) 显示完全信号丧失,表明多组分混合物的不稳定性.
- 氧 (O2) 的稳定性表现不一致.
结论:
- 对于许多ISO 14687级D污染物,多元组件气体标准是可行的,简化了质量控制.
- 甲和酸需要独立的稳定性考虑或替代标准格式.
- 这些发现提高了纯度测试的可靠性,并支持符合ISO 14687的标准.
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