用于自由基化学反应研究的真空紫外光电离飞行时间质谱仪

引用本文: 王涛, 唐小锋, 温作赢, 张翠红, 张为俊. 用于自由基化学反应研究的真空紫外光电离飞行时间质谱仪[J]. 分析化学, 2020, 48(1): 28-33. doi: 10.19756/j.issn.0253-3820.191607 shu

Citation: WANG Tao, TANG Xiao-Feng, WEN Zuo-Ying, ZHANG Cui-Hong, ZHANG Wei-Jun. A Vacuum Ultraviolet Photoionization Time-of-Flight Mass Spectrometer for Investigation of Free Radical Reaction[J]. Chinese Journal of Analytical Chemistry, 2020, 48(1): 28-33. doi: 10.19756/j.issn.0253-3820.191607 shu

用于自由基化学反应研究的真空紫外光电离飞行时间质谱仪

1.
安徽大学物质科学与信息技术研究院, 合肥 230601;
2.
中国科学院安徽光学精密机械研究所, 合肥 230026;
3.
中国科学技术大学环境科学与光电技术学院, 合肥 230026
基金项目:
本文系国家自然科学基金项目（Nos.21773249，91644109，91544228）和中国科学院项目（No.116134KYSB20170048）资助

摘要: 研制了真空紫外光电离飞行时间质谱仪，用于研究大气自由基化学反应。采用光子能量为10.6 eV的真空紫外放电灯作为电离源，利用新型笼式离子引出装置，实现了离子的高效率传输和聚焦。结果表明，仪器的检测灵敏度可达到0.03 μg/L。结合微波放电流动管反应器模拟大气化学中的气相自由基反应，并通过自由基自反应动力学实现了CH₃浓度的定量分析。另外，利用真空紫外光电离飞行时间质谱仪，对CH₃+NO自由基反应的动力学进行了研究，检测了反应中的产物信息，测得其在室温和300 Pa压力下的反应速率常数为k（CH₃+NO）=1.2×10^-12 cm³/（molecule·s）。

关键词:

English

A Vacuum Ultraviolet Photoionization Time-of-Flight Mass Spectrometer for Investigation of Free Radical Reaction

1.
Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China;
2.
Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230026, China;
3.
School of Environmental Science and Optoelectronics Technology, University of Science and Technology of China, Hefei 230026, China
Received Date: 15 October 2019
Revised Date: 01 November 2019
Fund Project:
This work was supported by the National Natural Science Foundation of China (Nos. 21773249, 91644109, 91544228) and the Chinese Academy of Sciences (No. 116134KSB20170048).

Abstract: A home-made vacuum ultraviolet (VUV) photoionization time-of-flight mass spectrometer (VUVPI-TOFMS) was assembled to study atmospheric radical reactions. In the work, a commercial VUV discharge lamp with photon energy at 10.6 eV was installed as light source and a cage-shaped photoionization source was employed to efficiently extract and focus ions. With this spectrometer, a limit of detection (LOD) of 0.03 μg/L (S/N=3) for benzene detection was obtained. Then a microwave discharge flow tube was employed as reactor to produce free radicals and model their atmospheric reactions. The concentration of the methyl radical was measured with its self-reaction kinetics within the flow tube. As a representative example, the reaction of CH₃ and NO was investigated by VUVPI-TOFMS. Both the stable species and radicals involved in the reaction were probed and the reaction rate constant at room temperature and 300 Pa pressure was measured to be k(CH₃+NO)=1.2×10^-12 cm³/(molecule·s).

Key words:

1. [1]
  Mellouki A, Le Bras G. Lasers Mater. Sci.,2000,301:47-67
2. [2]
  Tyndall G S, Cox R A, Granier C, Lesclaux R, Moortgat G K, Pilling M J, Ravishankara A R, Wallington T J. J. Geophys. Res.Atmos.,2001,106(D11):12157-12182
3. [3]
  Ball S M, Povey I M, Norton E G, Jones R L. Chem. Phys. Lett., 2001,342(1-2):113-120
4. [4]
  Pushkarsky M B, Zalyubovsky S J, Miller T A. J. Chem. Phys.,2000,112(24):10695-10698
5. [5]
  Gross J H. Principles of Ionization and Ion Dissociation, in Mass Spectrometry:A Textbook. 2011, Springer Berlin Heidellberg:Berlin Heidelberg:21-66
6. [6]
  Jirásko R, Holcapek M. Mass Spectrom. Rev.,2011,30(6):1013-1036
7. [7]
  Hanley L, Zimmermann R. Anal. Chem.,2009,81(11):4174-4182
8. [8]
  Slagle I R, Gutman D. J. Am. Chem. Soc.,1985,107(19):5342-5347
9. [9]
  Loison J C, Sanglar S, Villenave E. Rev. Sci. Instrum.,2005,76(5):053105
10. [10]
  Osborn D L, Zou P, Johnsen H, Hayden C C, Taatjes C A, Knyazev V D, North S W, Peterka D S, Ahmed M, Leone S R. Rev. Sci. Instrum.,2008,79(10):104103
11. [11]
  Howard C J. J. Phys. Chem.,1979,83(1):3-9
12. [12]
  Kaufman F. J. Phys. Chem.,1984,88(21):4909-4917
13. [13]
  Zhu Y P, Wu X K, Tang X F, Wen Z Y, Liu F Y, Zhou X G, Zhang W J. Chem. Phys. Lett.,2016,664:237-241
14. [14]
  Tang X F, Lin X X, Zhu Y P, Wu X K, Wen Z Y, Zhang L D, Liu F Y, Gu X J, Zhang W J. RSC Adv.,2017,7(46):28746-28753
15. [15]
  Tang X F, Zhou X G, Niu M L, Liu S L, Sun J D, Shan X B, Liu F Y, Sheng L S. Rev. Sci. Instrum.,2009,80(11):113101
16. [16]
  Tang X F, Garcia G A, Gil J F, Nahon L. Rev. Sci. Instrum.,2015,86(12):123108
17. [17]
  Jia L Y, Brech Y L, Mauviel G, Qi F, Dufour A. Energy Fuels,2016,30(3):1555-15563
18. [18]
  Yang B, Xu C, Shu J N, Li Z, Zhang H X, Ma P K. Talanta,2019, 194:888-894
19. [19]
  Wen Z Y, Tang X F, Wang C C, Fittschen C, Wang T, Zhang C H, Yang J Z, Pan Y, Liu F Y, Zhang W J. Int. J. Chem. Kinet.,2019,51(3):178-188
20. [20]
  Hua L, Wu Q H, Hou K Y, Cui H P, Chen P, Wang W G, Li J H, Li H Y. Anal. Chem.,2011,83(13):5309-5316
21. [21]
  HE Meng-Qi, HUA Lei, LI Qing-Yun, HOU Ke-Yong, CHEN Ping, CHAI Shuo, LI Hai-Yang. Chinese J. Anal. Chem.,2019,47(3):447-454 何梦琦, 花磊, 李庆运, 侯可勇, 陈平, 柴硕, 李海洋.分析化学,2019,47(3):447-454
22. [22]
  LI Qing-Yun, HUA Lei, HE Meng-Qi, LI Jia, JIANG JI-Chun, HOU Ke-Yong, TIAN Di, LI Hai-Yang. Chinese J. Anal. Chem.,2019,47(4):541-549 李庆运, 花磊, 何梦琦, 李佳, 蒋吉春, 侯可勇, 田地, 李海洋.分析化学,2019, 47(4):541-549
23. [23]
  Heger H J, Zimmermann R, Dorfner R, Beckmann M, Griebel H, Kettrup A, Boesl U. Anal. Chem.,1999,71(1):46-57
24. [24]
  Wang B S, Hou H, Yoder L M, Muckerman J T, Fockenberg C. J. Phys. Chem. A,2003,107(51):11414-11426
25. [25]
  NIST Chemistry WebBook. http://webbook.nist.gov/chemistry/. Accessed October 1.2019
26. [26]
  Northway M J, Jayne J T, Toohey D W, Canagaratna M R, Trimborn A, Akiyama K I, Shimono A, Jimenez J L, DeCarlo P F, Wilson K R, Worsnop D R. Aerosol Sci. Technol.,2007,41(9):828-839
27. [27]
  Persky A. Chem. Phys. Lett.,2003,380(3):286-291
28. [28]
  Jodkowski J T, Ratajczak E, Sillesen A, Pagsberg P. Chem. Phys. Lett.,1993,203(5-6):490-496

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用于自由基化学反应研究的真空紫外光电离飞行时间质谱仪

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A Vacuum Ultraviolet Photoionization Time-of-Flight Mass Spectrometer for Investigation of Free Radical Reaction

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