气相色谱法分析氢中痕量氨气

Analysis of Trace Ammonia in Hydrogen by Gas Chromatography

为了解决氢中痕量氨气难以检测的问题,建立了一种使用氦离子化检测器的气相色谱分析方法。以5(μmol/mol)的氨气为原料,制备了不同浓度的氨气样品进行气相色谱分析。结果表明,该分析方法测得氨气的峰面积相对标准偏差<1%,检出浓度可达10(nmol/mol)。为氢中痕量氨气的精准检测提供了有效实用的解决方案,也为氢能的发展提供了新的动力。

To address the challenge of detecting trace amounts of ammonia in hydrogen,a gas chromatography analysis method using a helium ion detector has been established.Ammonia gas samples with a variety of concentrations were prepared using 5(μmol/mol)ammonia as the base material and analyzed via gas chromatography.The results indicate that this analysis method offers a relative standard deviation of less than 1%for the peak area of ammonia,and the detection concentration can reach as low as 10(nmol/mol).This provides a practical solution for the precise detection of trace ammonia in hydrogen,offering new momentum for the development of hydrogen energy.