Ion cyclotron resonance study of the mechanism of chemical ionization. Mass spectroscopy of selected hydrocarbons using methane reagent gas

1972 ◽  
Vol 94 (11) ◽  
pp. 3748-3755 ◽  
Author(s):  
Roger P. Clow ◽  
Jean H. Futrell
Keyword(s):  
Mass Spectroscopy ◽  
Cyclotron Resonance ◽  
Chemical Ionization ◽  
Ionization Mass ◽  
Ion Cyclotron Resonance ◽  
Ionization Mass Spectroscopy ◽  
Ion Cyclotron

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.

Molecular characterization of petroporphyrins in crude oil by electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry

2001 ◽  
Vol 79 (5-6) ◽  
pp. 546-551 ◽  
Author(s):  
Ryan P Rodgers ◽  
Christopher L Hendrickson ◽  
Mark R Emmett ◽  
Alan G Marshall ◽  
Mark Greaney ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Fourier Transform ◽  
Crude Oil ◽  
Electrospray Ionization ◽  
Cyclotron Resonance ◽  
Spectrometric Analysis ◽  
Ionization Mass ◽  
Ion Cyclotron Resonance ◽  
Ion Cyclotron ◽  
Ft Icr

Petroporphyrin compositional analysis of a heavy crude oil has been realized by isolation and subsequent ESI-FT-ICR mass spectrometric analysis of the porphyrin-containing fractions. Vanadium octaethyl (V=O(II)OEP) and nickel octaethyl (Ni(II)OEP) porphyrin standards were analyzed to determine favorable electrospray ionization conditions and provide insight as to the molecular species present (e.g., adducts, multimers). Standard V=O(II)OEP and Ni(II)OEP solutions revealed the presence of both monomer and dimer species with a greater relative abundance of monomers. In contrast, mass spectral analysis of a porphyrin fraction from Cerro Negro crude oil was dominated by dimeric species. MS3 analysis identified a dioctylphthalate (DOP) contaminant, likely introduced during fractionation of the crude oil. DOP-porphyrin complexes and porphyrin-porphyrin dimers were then identified. Infrared multiphoton dissociation (IRMPD) of dimeric species produced the corresponding monomers with minimal fragmentation. The monomeric petroporphyrins were analyzed to reveal the metal (Ni(II) or V=O(II)), porphyrin type (e.g., etio vs. DPEP), and distribution of alkylation.Key words: petroporphyrin, porphyrin, petroleum, electrospray ionization, mass spectrometry, Fourier transform, ion cyclotron resonance, ICR, FT-ICR, FTMS.

Laser-induced acoustic desorption/chemical ionization in Fourier-transform ion cyclotron resonance mass spectrometry

2000 ◽  
Vol 198 (3) ◽  
pp. 173-188 ◽  
Author(s):  
James Pérez ◽  
Luis E. Ramı́rez-Arizmendi ◽  
Christopher J. Petzold ◽  
Leonard P. Guler ◽  
Eric D. Nelson ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Fourier Transform ◽  
Cyclotron Resonance ◽  
Chemical Ionization ◽  
Ion Cyclotron Resonance ◽  
Desorption Chemical Ionization ◽  
Ion Cyclotron ◽  
Acoustic Desorption
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