| 敞开式小型线-筒电极负电晕放电离子源(英文) |
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| 引用本文： | 唐飞,王晓浩,刘坤,张亮.敞开式小型线-筒电极负电晕放电离子源(英文)[J].光学精密工程,2009,17(8). |
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| 作者姓名： | 唐飞 王晓浩 刘坤 张亮 |
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| 作者单位： | 1. 清华大学,精密仪器与机械学系,精密测试技术及仪器国家重点实验室,北京,100084
2. 北京交通大学,电子信息工程学院,北京,100044 |
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| 基金项目： | Supported by the Nature Science Foundation of China (Grant No.60706030 ,No.20827007); NationalHigh-Tech Research and Development Programof China(863 Program) (Grant No.2007AA04Z337) |
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| 摘 要： | 针对目前商用质谱仪的离子源都为封闭式且工作在真空或者低气压环境中,应用范围十分受限这一问题,提出了一种新型的可在大气环境下工作的离子源.该离子源通过电晕放电产生离子,呈线-筒结构,由内电极和外筒电极组成,电极直径分别为0.16 mm和4 mm.外筒电极上开有对称的4个槽,用于通入样品和牵引离子.实验结果表明,在大气环境下,当载气为N2,内电极电压达到-3 800 V时,内电极和外筒电极之间发生电晕放电,可以很好地电离乙酸等负电性的化学物质.质谱图显示,大气中的N2和O2可能也参与电离,生成了NO-2 (m/z:46)、 NO-3 (m/z:62)和M+NO-H]- (m/z: 89).结合COMSOL仿真软件,对该离子源的放电起始电压进行了理论分析,分析结果与实验结果相符.此外,该离子源接口简单,可广泛应用于敞开式质谱仪、离子迁移质谱仪(IMS)和高场非对称波形离子迁移质谱仪(FAIMS)中.
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| 关 键 词： | 线筒结构 敞开式质谱仪 离子源 电晕放电 |
Ambient negative corona discharge ion source with small line-cylinder electrodes |
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| TANG Fei,WANG Xiao-hao,LIU Kun,ZHANG Liang.Ambient negative corona discharge ion source with small line-cylinder electrodes[J].Optics and Precision Engineering,2009,17(8). |
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| Authors: | TANG Fei WANG Xiao-hao LIU Kun ZHANG Liang |
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| Affiliation: | TANG Fei1,WANG Xiao-hao1,LIU Kun2,ZHANG Liang1(1.State Key Laboratory of Precision Measurement Technology and Instruments,Department of Precision Instruments and Mechanology,Tsinghua University,Beijing 100084,China,2.School of Electronics and Information Engineering,Beijing Jiaotong University,Beijing 100044,China) |
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| Abstract: | The mature ion source in a commercial mass spectrometer is sealed and works under vacuum or low atmospheric pressure environment,which limits the application of the mass spectrometer. In order to solve this problem,an ambient negative corona discharge ion source with line-cylinder electrodes is put forward in this paper. The gas discharge part in the ion source is composed of inner and outer electrodes with the diameters of 0.16 mm and 4 mm respectively. There are four slots in the outer electrode for injec... |
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| Keywords: | ambient mass spectrometry ion source line-cylinder corona discharge |
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