A comprehensive protocol for chemical analysis of flame combustion emissions by secondary ion mass spectrometry

被引：23
作者：
Irimiea, Cornelia [1 ,2 ]
Faccinetto, Alessandro [1 ]
Carpentier, Yvain [2 ]
Ortega, Ismael-Kenneth [3 ]
Nuns, Nicolas [4 ]
Therssen, Eric [1 ]
Desgroux, Pascale [1 ]
Focsa, Cristian [2 ]
机构：
[1] Univ Lille, CNRS, Lab Physicochim Proc Combust & Atmosphere, UMR 8522,PC2A, F-59000 Lille, France
[2] Univ Lille, CNRS, Lab Phys Lasers Atomes & Mol, UMR 8523,PhLAM, F-59000 Lille, France
[3] Univ Paris Saclay, ONERA, DMPE, F-91123 Palaiseau, France
[4] Univ Lille, CNRS, UMR 2638, Inst ME Chevreul, F-59000 Lille, France
来源：
RAPID COMMUNICATIONS IN MASS SPECTROMETRY | 2018年 / 32卷 / 13期
关键词：
POLYCYCLIC AROMATIC-HYDROCARBONS; LASER-INDUCED INCANDESCENCE; ATMOSPHERIC AEROSOLSURECENT DEVELOPMENTS; SOOT PARTICLES; TOF-SIMS; AEROSOL-PARTICLES; MULTIPHOTON IONIZATION; DEFECT ANALYSIS; NASCENT SOOT; RESOLUTION;
D O I：
10.1002/rcm.8133
中图分类号：
Q5 [生物化学];
学科分类号：
071010 ; 081704 ;
摘要：
RationaleTime-of-flight secondary ion mass spectrometry (TOF-SIMS) is used to provide detailed information on the surface chemical composition of soot. An analytical protocol is proposed and tested on a laboratory flame, and the results are compared with our previous measurements provided by two-step laser mass spectrometry (L2MS). MethodsThis work details: (1) the development of a dedicated apparatus to sample combustion products from atmospheric flames and deposit them on substrates suitable for TOF-SIMS analysis; (2) the choice of the deposition substrate and the material of the sampling line, and their effect on the mass spectra; (3) a method to separate the contributions of soot and condensable gas based on impact deposition; and finally (4) post-acquisition data processing. ResultsCompounds produced during flame combustion are detected on the surface of different deposition substrates and attributed a molecular formula based on mass defect analysis. Silicon and titanium wafers perform similarly, while the surface roughness of glass microfiber filters results in a reduced mass resolution. The mass spectra obtained from the analysis of different locations of the deposits obtained by impaction show characteristic patterns that are attributed to soot/condensable gas. ConclusionsA working method for the analysis of soot samples and the extraction of useful data from mass spectra is proposed. This protocol should help to avoid common experimental issues like sample contamination, while optimizing the setup performance by maximizing the achievable mass resolution.
引用
收藏
页码：1015 / 1025
页数：11
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