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学科主题物理化学
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)
会议名称The 19th International Society of Ion Mobility Spectrometry
会议日期2010-7-18
2010-07-18
会议地点美国
其他题名新型双极性离子迁移谱电离源及其应用
页码39/2
主办者美国新墨西哥州立大学
英文摘要Ionization 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.
语种中文
文献类型会议论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/114194
专题中国科学院大连化学物理研究所
通讯作者Li HY(李海洋)
推荐引用方式
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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