物理化学学报 >> 2002, Vol. 18 >> Issue (03): 232-236.doi: 10.3866/PKU.WHXB20020309

研究论文 上一篇    下一篇

潮湿空气微波放电离子形成动力学

程平;王鸿梅;李建权;张为俊;纪玉峰;王振亚;盛六四;Patrik Spanel;David Smith;曹德兆;储焰南   

  1. 中国科学院安徽光学精密机械研究所 环境光谱学实验室,合肥 230031;中国科学技术大学国家同步辐射实验室,合肥 230026;Centre for Science and Technology in Medicine, Keele University,Thornburrow Drive, Hartshill, Stoke on Trent, ST4 7QB, U.K.
  • 收稿日期:2001-07-31 修回日期:2001-11-15 发布日期:2002-03-15
  • 通讯作者: 储焰南 E-mail:ychu@aiofm.ac.cn

Ion Formation in Microwave Discharge through Moist Air

Cheng Ping;Wang Hong-Mei;Li Jian-Quan;Zhang Wei-Jun;Ji Yu-Feng;Wang Zhen-Ya;Sheng Liu-Si;Patrik Spanel;David Smith;Cao De-Zhao;Chu Yan-Nan   

  1. Laboratory of Environmental Spectroscopy, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031;National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026;Centre for Science and Technology in Medicine, Keele University, Thornburrow Drive, Hartshill, Stoke on Trent, ST4 7QB, U.K.
  • Received:2001-07-31 Revised:2001-11-15 Published:2002-03-15
  • Contact: Chu Yan-Nan E-mail:ychu@aiofm.ac.cn

摘要: 利用微波放电电离质谱装置,通过水蒸气与空气混合气体(潮湿空气)的微波放电,同时获得了化学电离质谱探测技术中常用的三种重要母体离子H3O+、NO+和.结合潮湿空气中主要成分N2、O2以及水蒸气各自微波放电后的质谱探测结果,对潮湿空气微波放电后上述三种离子产生的动力学过程进行了分析,并给出了各种离子的形成机制.这些离子分子反应过程在计算机模拟中得到了进一步的证实.

关键词: 离子源, 微波放电, 离子化学

Abstract: A quadrupole mass spectrometer was used to diagnose the ionic products from the microwave discharge through a mixture of air and water vapor. H3O+,NO+ and , important primary reagent ions in the chemical ionization mass spectrometry(SIFTMS) were observed at ionic beam current of up to 10 nA. The formation mechanisms for the above ions generated in the discharge were analyzed in conjunction with the ions detectied in the cases of N2, O2 and H2O microwave discharges, respectively. Thus, various ionmolecule reactions involving the primary ions , N+, , O+, H2O+ and OH+ were proposed to be responsible for the formation of H3O+,NO+ and , which were also demonstrated by computer simulation based on such ionmolecule reactions.

Key words: Ion source, Microwave discharge, Ion chemistry