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Aerosol particles, tobacco smoke, crude oil, coffee roasting and industrial processes: Analysis of complex materials, thermal processes and aerosols by photo-Ionisation mass spectrometry(PIMS)

Aerosol particles, tobacco smoke, crude oil, coffee roasting...

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2018年中国质谱学术大会（CMSC2018）

作者： R.Zimmermann S.Ehlert J.Heide M.R.Saraji-Bozorgzad A.Walte T.Streibel C.Grimmer H.Czech X.Li L.Li Z.Zhou J.Schade R.Irsig J.Passig Joint mass spectrometry Center of Helmholtz Zentrum München and University of Rostock Institute of mass spectrometry and Atmospheric Environment Jinan University

mass spectrometry with soft photo-Ionisation(PIMS)1 enables the direct detection of trace molecules in complex organic vapours as well as in pyrolysis or combustion off-gases. This renders PIMS to a well suited tool for Evolved Gas Analysis(EGA) in Thermal Analysis(TA), for detection of the molecular organic signatures of desorption, pyrolysis and combustion processes as well as for applied and fundamental combustion research. In the lecture a brief explanation of the principles of the used photo-ionisation mass spectrometry approaches is given(multi-and single-photon ionisation). In the following the hyphenations of TA-devices to PIMS analysers are presented(e.g. thermogravimetry-PIMS) and applications such as crude oil-analysis are discussed. PIMS also allow the direct monitoring of combustion and pyrolysis processes, e.g. for industrial process monitoring purposes or more fundamental combustion studies. For example the formation of flavour compounds during the coffee roasting process or the formation of toxic compounds form wood combustion or cigarette smoking can be addressed. In summary the potential of soft photo-ionisation mass spectrometry for applied industrial-as well as fundamental-research is demonstrated and discussed. In a second part, the application of photo ionization mass spectrometry for on-line detection of the composition of individual aerosol particles is addressed. The so called aerosol time-of flight mass spectrometry(ATOF) or single particle mass spectrometry(SPAMS) approach uses laser desorption/ionization to generate negative and positive ions(elemental cations, complex cations and anions), mainly from the inorganic bulk of individual airborne aerosol particles of 0.2-20 μm diameter. A SPAMS system of HEXIN Inc. has been equipped with a photonion GmbH excimer laser and was applied to detect trace emissions of ships using residual fuel using V as tracer. A new development enables the SPAMS approach to detect both, inorganic toxic compounds,

关键词： photo ionization mass spectrometry on-line monitoring of gases and aerosol particles

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