Laser mass-spectrometry for online diagnosis of reactive plasmas with many species

2011 ◽  
Vol 82 (6) ◽  
pp. 063110 ◽  
Author(s):  
Chun-Lei Feng ◽  
Liang Gao ◽  
Jia-Hong Liu ◽  
Lei Zhang ◽  
Hongbin Ding
Keyword(s):  
Mass Spectrometry ◽  
Laser Mass Spectrometry

Solid state chemical ionization for characterization of organic compounds by laser mass spectrometry

Talanta ◽  
1989 ◽  
Vol 36 (1-2) ◽  
pp. 117-124 ◽  
Author(s):  
Kesagapillai Balasanmugam ◽  
Somayajula Kasi Viswanadham ◽  
David M. Hercules
Keyword(s):  
Mass Spectrometry ◽  
Solid State ◽  
Organic Compounds ◽  
Chemical Ionization ◽  
Laser Mass Spectrometry ◽  
State Chemical

Nano- and Femtosecond Laser Mass Spectrometry of Organic Molecules and Cluster

2009 ◽  
Author(s):  
Osama Abdel Rahman ◽  
Jürgen Grotemeyer ◽  
Tetuso Iguchi ◽  
Kenichi Watanabe
Keyword(s):  
Mass Spectrometry ◽  
Femtosecond Laser ◽  
Organic Molecules ◽  
Laser Mass Spectrometry

scholarly journals Chemical discrimination of the particulate and gas phases of miniCAST exhausts using a two-filter collection method

2019 ◽  
Author(s):  
Linh Dan Ngo ◽  
Dumitru Duca ◽  
Yvain Carpentier ◽  
Jennifer A. Noble ◽  
Raouf Ikhenazene ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Human Health ◽  
Gas Phase ◽  
Sampling Method ◽  
Volatile Components ◽  
Chemical Compositions ◽  
Laser Mass Spectrometry ◽  
Gas Phases ◽  
The Impact ◽  
Filter Sampling

Abstract. Combustion of hydrocarbons produces both particulate and gas phase emissions responsible for major impacts on atmospheric chemistry and human health. Ascertaining the impact of these emissions, especially on human health, is not straightforward because of our relatively poor knowledge of how chemical compounds are partitioned between the particle and gas phases. Accordingly, we propose to couple a two-filter sampling method with a multi-technique analytical approach to fully characterize the particulate and gas phase compositions of combustion by-products. The two-filter sampling method is designed to retain particulate matter (elemental carbon possibly covered in a surface layer of adsorbed molecules) on a first quartz fiber filter while letting the gas phase pass through, and then trap the most volatile components on a second black carbon-covered filter. All samples thus collected are subsequently subjected to a multi-technique analytical protocol involving two-step laser mass spectrometry (L2MS), secondary ion mass spectrometry (SIMS), and micro-Raman spectroscopy. Using the combination of this two-filter sampling/multi-technique approach in conjunction with advanced statistical methods we are able to unravel distinct surface chemical compositions of aerosols generated with different set points of a miniCAST burner. Specifically, we successfully discriminate samples by their volatile, semi-volatile and non-volatile polycyclic aromatic hydrocarbon (PAH) contents and reveal how subtle changes in combustion parameters affect particle surface chemistry.

A New Way To Detect Noncovalently Bonded Complexes of Biomolecules from Liquid Micro-Droplets by Laser Mass Spectrometry

2006 ◽  
Vol 59 (2) ◽  
pp. 109 ◽  
Author(s):  
Nina Morgner ◽  
Hans-Dieter Barth ◽  
Bernhard Brutschy
Keyword(s):  
Mass Spectrometry ◽  
Quantitative Analysis ◽  
Liquid Phase ◽  
Laser Pulses ◽  
Laser Mass Spectrometry ◽  
Native Solution ◽  
On Demand ◽  
Ir Laser ◽  
Intensity Threshold ◽  
Wide Range

A new version of laser mass-spectrometry is presented, which allows the quantitative analysis of specific biocomplexes in native solution. On-demand micro droplets, injected into vacuum, are irradiated by mid IR-laser pulses. Above a certain intensity threshold they explode due to the transmitted energy, setting free a fraction of the charged biomolecules which are then mass-analyzed. Amounts of analyte in the attomolar range may be detected with the ion intensity being linear over a wide range of molarity. Evidence is given that this method is soft, tolerant against various buffers, reflects properties of the liquid phase, and suitable for studying noncovalently bonded specific complexes. This is highlighted by results from antibiotics specifically binding into the minor groove of duplex DNA.

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