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Citation: 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. Ion Formation in Microwave Discharge through Moist Air[J]. Acta Physico-Chimica Sinica, ;2002, 18(03): 232-236. doi: 10.3866/PKU.WHXB20020309 shu

Ion Formation in Microwave Discharge through Moist Air

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 Date: 31 July 2001
Available Online: 15 March 2002

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.
- Ion source;Microwave discharge;Ion chemistry
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