Development of an ion attachment mass spectrometer for direct detection of intermediates in combustion flames

2008 ◽  
Vol 22 (22) ◽  
pp. 3588-3592 ◽  
Author(s):  
Takahiro Torii ◽  
Takashi Nishimura ◽  
Megumi Nakamura ◽  
Yoshiro Shiokawa ◽  
Kozo Matsumoto ◽  
...  
Keyword(s):  
Mass Spectrometer ◽  
Direct Detection ◽  
Ion Attachment

Development of a tabletop time-of-flight mass spectrometer with an ion attachment ionization technique

2007 ◽  
Vol 21 (16) ◽  
pp. 2654-2662 ◽  
Author(s):  
Naoaki Saito ◽  
Jyun-ichi Nanjyo ◽  
Yasuyuki Taneda ◽  
Yoshiro Shiokawa ◽  
Mitsumori Tanimoto
Keyword(s):  
Mass Spectrometer ◽  
Time Of Flight ◽  
Ionization Technique ◽  
Flight Mass Spectrometer ◽  
Ion Attachment

Untersuchung der Photodissoziation von Butadien-(1,3), Buten-(1), Hydrazin und Akrolein im Massenspektrometer

1967 ◽  
Vol 22 (12) ◽  
pp. 2027-2035 ◽  
Author(s):  
K. Bergmann ◽  
W. Demtröder
Keyword(s):  
High Pressure ◽  
Excited State ◽  
Mass Spectrometer ◽  
Wavelength Range ◽  
Molecular Beam ◽  
Direct Detection ◽  
Reaction Chamber ◽  
Special Technique ◽  
Absorption Bands ◽  
Ion Chamber

The primary processes in the photodissociation of 1,3-butadiene, 1-butene, hydrazine and acrolein are investigated by direct detection of the fragments in a mass spectrometer at pressures of 10-4mm Hg in the reaction chamber. The light of a pulsed high pressure argon flash lamp is focussed into a molecular beam inside the ion-chamber. A definite wavelength-range of this light continuum is selected by the transmission limit of the quartz optic and the absorption bands of the molecules under investigation. With the special technique used here, collisions do not occur during the time between photon impact and primary product detection. The resulting primary photodissociation fragments are as follows:a) butadiene: C3H3 + CH3; C4H5 + H; C2H4 + C2H2; C2H3 + C2H3; C4H4 + H2b) 1-butene: C4H7 + H; C3H5 + CH3; C2H4 + C2H4; C2H5 + C2H3c) hydrazine: N2H3 + H; NH2 + NH2d) acrolein: C2H2CHO + H; C2H4 + CO; C2H3 + HCO.The probabilities for these different dissociation modes are derived from the measured ion spectra of the neutral photodissociation fragments that are produced by electrons of different energies. A comparison is made with results of photolysis at higher pressures and some conclusions concerning the original excited state of the parentmolecules and fragment energies are discussed.

Design and performance of an evolved gas analysis ion attachment mass spectrometer

2010 ◽  
Vol 24 (17) ◽  
pp. 2625-2630 ◽  
Author(s):  
Seiji Takahashi ◽  
Masamichi Tsukagoshi ◽  
Yuki Kitahara ◽  
Márta Juhász ◽  
Toshihiro Fujii
Keyword(s):  
Mass Spectrometer ◽  
Evolved Gas Analysis ◽  
Gas Analysis ◽  
Evolved Gas ◽  
Ion Attachment ◽  
And Performance

Sodium ion attachment reactions in an ion trap mass spectrometer

2000 ◽  
Vol 14 (12) ◽  
pp. 1066-1073 ◽  
Author(s):  
T. Faye ◽  
A. Brunot ◽  
M. Sablier ◽  
J. C. Tabet ◽  
T. Fujii
Keyword(s):  
Mass Spectrometer ◽  
Ion Trap ◽  
Sodium Ion ◽  
Ion Trap Mass Spectrometer ◽  
Ion Attachment

scholarly journals Mercury fractionation in gypsum using temperature desorption and mass spectrometric detection

2018 ◽  
Vol 16 (1) ◽  
pp. 544-555 ◽  
Author(s):  
Majda Pavlin ◽  
Arkadij Popović ◽  
Radojko Jaćimović ◽  
Milena Horvat
Keyword(s):  
Mass Spectrometer ◽  
Fine Particles ◽  
Direct Detection ◽  
Maximum Temperature ◽  
Experimental Conditions ◽  
Mercury Compounds ◽  
Thermal Release ◽  
Low Concentrations ◽  
Mercury Fractionation ◽  
Temperature Programmed

AbstractA quadrupole mass spectrometer was used to study the thermal release of mercury from wet flue gas desulphurization (WFGD) gypsum using temperature-programmed desorption/decomposition (TPD). The inability in direct detection of low concentrations of mercury halogenides in gypsum by mass spectrometry is discussed in detail. The hydrolysis of HgCl2 vapours under specific experimental conditions in the mass spectrometer was considered theoretically and proved experimentally. The mercury concentration in different gypsum fractions varies from 0.22 mg kg-1 (3.27-148 μm, coarse particles) to 20.6 mg kg-1 (0.41-88.0 μm, fine particles). All samples had a similar, symmetrical, single-peak (peak maximum 253–266°C) in the TPD spectra. In the present study, the use of ‘wet’ methods for preparing mercury compounds is introduced in addition to the mercury standards prepared using the ‘dry’ method, as commonly found in TPD. The study showed that selected metals, such as Fe enriched in gypsum samples, significantly influence the shape and the maximum temperature of the Hg TPD curves and that during the mercury compound preparation and the TPD process, Hg species undergo transformations that prevent the identification of their original identity.

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