基于色谱法校正因子测定氢气中 微量氩杂质方法研究.

Objectives The study aims to facilitate China’s hydrogen energy industry and improve the quality of hydrogen, as well as solving the technical problem of argon impurity quantification due to the difficulty of effective separation of oxygen and argon in hydrogen quality analysis method. Methods An analytical method for accurate determination of trace argon impurity in hydrogen based on chromatographic correction factor is established. Firstly, the helium ionization gas chromatographic method is established through the self-prepared reference materials of argon in hydrogen and oxygen in hydrogen, along with the correction factors of oxygen and argon on the helium ionization gas chromatograph are researched; Secondly, the response relationship between oxygen and argon is calculated, while the long-term stability of which is investigated; Thirdly, by using the micro oxygen analyzer, the oxygen impurity content in hydrogen is measured. Results The argon impurity content in hydrogen is accurately determined according to the response relationship between oxygen and argon. Conclusions A new method combined helium ionization gas chromatography with electrochemical method is first proposed for the determination of trace argon impurity in hydrogen. It provides the guarantee on the accuracy data of argon content in hydrogen with the advantages of simplicity, strong operability and wide determination range, making up for the deficiency of argon impurity analysis method. Furthermore, the application of this method has great potential on the evaluation of the hydrogen quality. [ABSTRACT FROM AUTHOR]