Two‐photon‐ionization mass spectroscopy of ammonia clusters in a pulsed supersonic nozzle beam

1983 ◽  
Vol 79 (4) ◽  
pp. 1732-1740 ◽  
Author(s):  
Hisanori Shinohara
Keyword(s):  
Mass Spectroscopy ◽  
Supersonic Nozzle ◽  
Ionization Mass ◽  
Two Photon ◽  
Ionization Mass Spectroscopy ◽  
Photon Ionization ◽  
Nozzle Beam ◽  
Ammonia Clusters ◽  
Supersonic Nozzle Beam

The electronically excited à states of ammonia clusters as revealed by two-photon ionization mass spectroscopy

1986 ◽  
Vol 130 (3) ◽  
pp. 231-235 ◽  
Author(s):  
Hisanori Shinohara ◽  
Kenji Sato ◽  
Yohji Achiba ◽  
Nobuyuki Nishi ◽  
Katsumi Kimura
Keyword(s):  
Mass Spectroscopy ◽  
Ionization Mass ◽  
Two Photon ◽  
Ionization Mass Spectroscopy ◽  
Electronically Excited ◽  
Photon Ionization ◽  
Ammonia Clusters

Resonance-enhanced two-photon ionization mass spectroscopy of ephedrine: Indication for a state-selective fragmentation in a flexible molecule

2007 ◽  
Vol 442 (4-6) ◽  
pp. 238-244 ◽  
Author(s):  
R. Karaminkov ◽  
S. Chervenkov ◽  
P. Härter ◽  
H.J. Neusser
Keyword(s):  
Mass Spectroscopy ◽  
Ionization Mass ◽  
Two Photon ◽  
Flexible Molecule ◽  
Ionization Mass Spectroscopy ◽  
Photon Ionization

Photoionization of ammonia clusters in a pulsed supersonic nozzle beam by vacuum-UV rare-gas resonance lines

1984 ◽  
Vol 106 (4) ◽  
pp. 302-306 ◽  
Author(s):  
H. Shinohara ◽  
N. Nishi ◽  
N. Washida
Keyword(s):  
Supersonic Nozzle ◽  
Rare Gas ◽  
Nozzle Beam ◽  
Ammonia Clusters ◽  
Vacuum Uv ◽  
Supersonic Nozzle Beam

scholarly journals Development of a photochemical source for the production and calibration of acyl peroxynitrate compounds

2015 ◽  
Vol 8 (5) ◽  
pp. 2225-2231 ◽  
Author(s):  
P. R. Veres ◽  
J. M. Roberts
Keyword(s):  
Dynamic System ◽  
Mass Spectroscopy ◽  
Chemical Ionization ◽  
Acyl Chloride ◽  
Ionization Mass ◽  
Gas Chromatograph ◽  
Iodide Ion ◽  
Ionization Mass Spectroscopy ◽  
Subsequent Separation ◽  
Standard Production

Abstract. A dynamic system for the calibration of acyl peroxynitrate compounds (APNs) has been developed in the laboratory to reduce the difficulty, required time, and instability of laboratory-produced standards for difficult-to-synthesize APN species. In this work we present a photochemical source for the generation of APN standards: acetyl peroxynitrate (PAN), propionyl peroxynitrate (PPN), acryloyl peroxynitrate (APAN), methacryloyl peroxynitrate (MPAN), and crotonyl peroxynitrate (CPAN). APNs are generated via photolysis of a mixture of acyl chloride (RC(O)Cl) and ketone (RC(=O)R) precursor compounds in the presence of O2 and NO2. Subsequent separation by a prep-scale gas chromatograph and detection with a total NOy instrument serve to quantify the output of the APN source. Validation of the APN products was performed using iodide ion chemical ionization mass spectroscopy (I- CIMS). This method of standard production is an efficient and accurate technique for the calibration of instrumentation used to measure PAN, PPN, APAN, MPAN, and CPAN.

scholarly journals FRAGMENTATION STUDIES OF D6,7-ANHIDROERITROMISIN-A BY LIQUID CHROMATOGRAPHY-MASS SPECTROSCOPY (LC-MS)

2010 ◽  
Vol 9 (3) ◽  
pp. 474-478
Author(s):  
Khairan Khairan ◽  
Umar A. Jenie ◽  
Retno S. Sudibyo
Keyword(s):  
Liquid Chromatography ◽  
Electrospray Ionization ◽  
Mass Spectroscopy ◽  
Saccharopolyspora Erythraea ◽  
Wave Number ◽  
Ionization Mass ◽  
Fragmentation Pattern ◽  
Ionization Mass Spectroscopy ◽  
Stretching Vibration ◽  
Two Peaks

Semisynthesis of D6,7-Anhydroerythromycin-A was done by biomodification technique by addition of 0.2% INH into a culture fermentation of Saccharopolyspora erythraea ATCC 11635 in medium Hutchinson. The aim of this research is to studies of fragmentation pattern from new matabolite of D6,7-Anhydroerythromycin-A by Liquid Chromatography-Mass Spectroscopy (LC-MS) and the ionization of mass spectroscopy is use by ESI (Electrospray Ionization) pattern. The FT-IR spectrometric analyzes showed a stretching vibration of C=C conjugated group at wave number 1602.7 cm-1. This C=C conjugated vibration indicated the existence of double bond between C6 and C7 (D6,7), this confirmed that isolate contained D6,7-Anhydroerythromycin-A (the possibility of D6,7 was positive). For complementation, a LC-MS (Liquid Chromatography-Mass Spectroscopy) analyzes using ESI-MS (Electrospray Ionization-Mass Spectroscopy) ionization pattern was conducted to the isolate which resulted Quassimolecular ions [M+H]+ of D7,8- and D6,7-Anhydroerythromycin-A. LC-MS spectrogram of the isolate, which gave two peaks of m/z 732.2460 and m/z 716.2522, confirmed that the m/z 732.2460 possibly was D7,8-Anhydroerythromycin-A, while the m/z 716.2502 and m/z 715.2522 possibly were D6,7-Anhydroerythromycin-A.   Keywords: isoniazid, enoyl reduction, D6,7-Anhidroeritromisin-A, fragmentation, LC-MS.

Analysis of explosives using chemical ionization mass spectroscopy

1978 ◽  
Vol 26 (3) ◽  
pp. 267-277 ◽  
Author(s):  
Christopher T. Pate ◽  
Martin H. Mach
Keyword(s):  
Mass Spectroscopy ◽  
Chemical Ionization ◽  
Ionization Mass ◽  
Ionization Mass Spectroscopy

Diode-Laser-Initiated Resonance Ionization Mass Spectroscopy of Sm I

2000 ◽  
Vol 37 (5) ◽  
pp. 697-700 ◽  
Author(s):  
Hyunmin Park ◽  
Miran Lee ◽  
E. C. Jung ◽  
Jonghoon Yi ◽  
Yongjoo Rhee ◽  
...  
Keyword(s):  
Diode Laser ◽  
Mass Spectroscopy ◽  
Resonance Ionization ◽  
Ionization Mass ◽  
Ionization Mass Spectroscopy

Determination of the first ionization potential of nine actinide elements by resonance ionization mass spectroscopy

1998 ◽  
Author(s):  
G. Passler ◽  
M. Nunnemann ◽  
G. Huber ◽  
R. Deißenberger ◽  
N. Erdmann ◽  
...  
Keyword(s):  
Ionization Potential ◽  
Mass Spectroscopy ◽  
Resonance Ionization ◽  
Ionization Mass ◽  
Ionization Mass Spectroscopy ◽  
First Ionization Potential ◽  
Actinide Elements

Solvation of Lithium Ions in Mixed Organic Electrolyte Solutions by Electrospray Ionization Mass Spectroscopy

2002 ◽  
Vol 149 (8) ◽  
pp. A1045 ◽  
Author(s):  
Yoshiharu Matsuda ◽  
Tsuyoshi Fukushima ◽  
Hiroyuki Hashimoto ◽  
Ryuichi Arakawa
Keyword(s):  
Electrospray Ionization ◽  
Mass Spectroscopy ◽  
Electrolyte Solutions ◽  
Organic Electrolyte ◽  
Ionization Mass ◽  
Lithium Ions ◽  
Electrospray Ionization Mass Spectroscopy ◽  
Ionization Mass Spectroscopy
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