固相微萃取-气相色谱联用技术分析混合气体中微量氢

Determination of Hydrogen in Mixing Gas Using Solid-PhaseMicroextraction and Gas Chromatography

摘要: 制备钯-5A分子筛萃取头，使用固相微萃取-气相色谱联用技术，建立了对混合气体中微量氢气的分析方法.实验结果表明，含氢浓度在0.001 1～0.125 0 mL/L范围内，具有良好线性关系，检出限为9×10_-4 mL/L. 此方法和气相色谱法比较，有更高的灵敏度和更少的干扰，2种方法的标准偏差为8.7%.

Abstract: A method for fast analysis of minimum hydrogen from mixture gas was established. This method was performed by using solid phase microextraction with a preparate Pd-5A molecule sieve, coated fiber coupled with gas chromatography. The results showed that the linear range of hydrogen was 0.001 1～0.125 0 mL/L. The limit detection is 9×10^-4 mL/L. This method compared to gas chromatography has the advantages of high sensitivity and less interference. The standard deviations of two methods are 8.7%.