Subject Area物理化学
A Novel Bipolar Ionization Source for Ion Mobility Spectrometry And Its Applications
Chen C(陈创); Dong C(董璨); Wang WG(王卫国); Li HY(李海洋)
Conference NameThe 19th International Society of Ion Mobility Spectrometry
Conference Date2010-7-18
Conference Place美国
Alternative Title新型双极性离子迁移谱电离源及其应用
Funding Organization美国新墨西哥州立大学
AbstractIonization source is one of the most important parts for ion mobility spectrometer. A novel ultraviolet radiation ionization (UVRI) source based on a commercial VUV Kr lamp was developed for ion mobility spectrometry (IMS), which could operate in both negative and positive ion mode. The negative reactant ions and its formation mechanism were investigated. The negative reactant ions were predominantly assigned to be O3-(H2O)n with purified air as carrier and drift gases, which is different from that in 63Ni source. The formation of O3-(H2O)n was ascribed to the formation of large number of ozone molecules due to ultraviolet radiation. Its applications as a negative ion source was investigated, it was shown that the ionization efficiency was high for ionization explosives as ANFO, DINA, RDX, PETN and the signal intensity of PETN with UVRI is 4 times of that with 63Ni source under same experimental conditions. It can be used to ionize efficiently inorganic molecules as SO2, CS2, and H2S, HSCH3CH3SH and the limit of detection can reach sub-ppb level. Also, its applications as a positive source will be introduced.
Document Type会议论文
Corresponding AuthorLi HY(李海洋)
Recommended Citation
GB/T 7714
Chen C,Dong C,Wang WG,et al. A Novel Bipolar Ionization Source for Ion Mobility Spectrometry And Its Applications[C],2010:39/2.
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