电子浓缩富集气相色谱法测定燃料氢中甲醛  

Determination of formaldehyde in fuel hydrogen by gas chromatography with electronic concentration and enrichment

作　　者：王祥科 李超清 钱阿慧 WANG Xiang-ke;LI Chao-qing;QIAN A-hui(Langxi Instrument(Shanghai)Co.,Ltd.,Shanghai 201702,China)

机构地区：[1]朗析仪器(上海)有限公司,上海201702

出　　处：《聚酯工业》2024年第2期15-18,共4页Polyester Industry

摘　　要：氢燃料电池是未来新能源发展的主要方向。甲醛是燃料氢中的杂质组分之一,对燃料电池有毒化作用,因此准确测定燃料氢中甲醛含量是极为重要的工作。本文基于电子预浓缩富集气相色谱脉冲氦离子检测器建立了可用于氢中甲醛的检测方法。用高纯氢气稀释甲醛模拟燃料氢中甲醛检出限测定,分别探究了浓缩体积、本底吹扫时间、解析吹扫时间、解析温度和解析时间对甲醛出峰的影响,得到最优分析条件。采用优化后的条件对甲醛标准物质进行检测,结果表明,甲醛检出限为0.03 ppm, RSD为3%。该方法避免了人为干扰,具有良好的重复性,为燃料氢中甲醛测定提供了可靠的技术手段。Hydrogen fuel cells are the main direction for the development of new energy in the future.Formaldehyde is one of the impurity components in fuel hydrogen,which has a toxic effect on fuel cells.Therefore,accurately measuring the formaldehyde content in fuel hydrogen is extremely important.This article establishes a detection method for formaldehyde in hydrogen based on electronic pre concentration enrichment gas chromatography pulse helium ion detector.The detection limit of formaldehyde in simulated fuel hydrogen was measured by diluting form-aldehyde with high-purity hydrogen gas.The effects of concentration volume,background blowing time,analytical blowing time,analytical temperature,and analytical time on formaldehyde peak were investigated,and the optimal analytical conditions were obtained.The optimized conditions were used to detect formaldehyde standard sub-stances,and the results showed that the detection limit for formaldehyde was 0.03 ppm,with an RSD of 3%.This method avoids human interference and has good repeatability,providing a reliable technical means for the determi-nation of formaldehyde in fuel hydrogen.

关 键 词：燃料氢 甲醛 电子浓缩:气相色谱 

分 类 号：O622[理学—有机化学]